The palpi are short and tolerably strong; their colour is similar to that of the legs, and they are also furnished with hairs and numerous spine-like bristles, the terminal claw being slightly curved and finely pectinated.

The falces are strong, rather prominent near their base in front, where they are also thickly marked with somewhat quadrate dull yellow-brown blotches; and thence to their extremities on the inner surface there are numerous strong bristles, some of which are of a spinous character.

The sternum is of a short oval form, truncate before and produced into a point behind, at the extremity of which as well as opposite the insertion of each of the first three pairs of legs is a small tubercle.

The abdomen is quite flat and of a subtriangular form, the apex forming the hinder extremity, which is bifid or broadly notched. Each of the numerous pentagonal shining compartments into which its surface (both above and below) is mapped out has a large central oval depression, made more conspicuous by a brown spot; the fore margin is slightly scalloped, hollow in the middle, enlarging and rounding on either side to the fore corner, which is armed with a strong, deep, blackish red-brown, slightly curved, but not very sharppointed spine; between this spine and the central hollow part of the fore margin there are, on each side, at the salient points of the scalloped border, four small, brown, blunt-pointed tuberculiform spines; the whole of the margins of the abdomen, both above and below, are thickly studded with minute round, brown and shining tubercles, each of which bears a small bristle; these bristles are not prominent, but sessile, and are thus scarcely visible, except under a magnifying-glass; the ribs which divide the shining pentagonal plates or bosses are also studded with, for the most part a single row of, very minute, brown, shining, bristle-bearing tubercles.

This remarkable spider, which in its general appearance bears some resemblance to a small butterfly, shows a strong affinity both to the Gasteracanthides and to Arcys, and is evidently a transitional form; but as it appears to me to be more nearly allied to the latter than to any of the groups of Gasteracanthides, not only by its general form, but by the peculiar structure of the cephalothorax, I have placed it along with Arcys in the family Arcydes; it differs, however, remarkably from Arcys in the general character and lengths of the legs, as also in the details of the abdominal scutum; for which and other reasons it has been necessary to constitute a new genus for its reception.

A single example was contained in a small collection of spiders from Madagascar, purchased of a London dealer in 1876.

List of Species.

Fam. THERAPHOSIDES.

Atrax robustus Q, New Holland, p. 27, Pl. VI. fig. 1.

Idiophthalma suspecta Q, Granada, South America, p. 27, Pl. VI. fig. 2. Aganippe subtristis Q, Adelaide, Australia, p. 28, PI. VI. fig. 3. latior, West Australia, p. 29, Pl. VI. fig. 4.

Eriodon insignis, Swan River, Australia, p. 29, Pl. VI. fig. 5. incertus, Swan River, p. 30.

Fam. PHORONCIDIDES.

Phoroncidia aurata Q, Madagascar, p. 31, Pl. VII. fig. 9.

Fam. GASTERACANTHIDES.

Paraplectana maritata ♂ and Q, Ceylon, p. 32, Pl. VII. fig. 7.
decora, Rio Grande, South America, p. 34, Pl. VII. fig. 8.
Kochi, Cape York, Australia, p. 35, Pl. VII. fig. 10.
Fam. ARCYDES.

Augusta papilionacea Q, Madagascar, p. 37, Pl. VII. fig. 6.

EXPLANATION OF THE PLATES.

PLATE VI.

Fig. 1. Atrax robustus : a, spider of natural size; b, cephalothorax and falces, in profile; c, eyes, from above and behind; d, maxillæ, labium, and sternum.

Fig. 2. Idiophthalma suspecta : a, spider, enlarged; b, cephalothorax and falces, in profile; c, eyes, from above and behind; d, maxillæ and labium; e, natural length to the extremity of the falces. Fig. 3. Aganippe subtristis : a, spider, enlarged; b, cephalothorax and falces, in profile; c, eyes, from above and behind; d, maxillæ, labium, and sternum; e, natural length to the extremity of the falces.

Fig. 4. Aganippe latior : a, spider, slightly enlarged; b, cephalothorax and falces, in profile; c, eyes, from above and behind; d, natural length to the extremity of the falces.

Fig. 5. Eriodon insignis♂: a, spider, slightly enlarged; b, cephalothorax and falces, in profile; c, eyes, from above and behind; d, maxillæ, labium, and sternum; e, right palpus, from outer side; f, extremity of tarsus of leg of first pair; g, natural length to the extremity of the falces.

Fig. 6. Augusta papilionacea

PLATE VII.

: a, spider, enlarged; b, caput and eyes, from in front; c, maxillæ, labium, and sternum; d, spider, of natural size.

Fig. 7. Paraplectana maritata ♂ and 9: a, spider (9), enlarged; b, ditto, in profile; d, ditto, natural size; c, spider (♂), enlarged; e, natural length of ditto.

Fig. 8. Paraplectana decora : a, spider, enlarged; b, ditto, natural size; c, ditto, in profile.

Fig. 9. Phoroncidia aurata : a, spider, enlarged; b, ditto, in profile; c, view of abdomen, from behind; d, profile of caput; e, spider,

of natural size.

Fig. 10. Paraplectana Kochii: a, spider, enlarged; b, ditto, in profile; c, ditto, natural size.

III.-Notes on Foraminifera. By E. PERCEVAL Wright, M.D., F.L.S., Professor of Botany in the University of Dublin, Secretary of the Royal Irish Academy.

WHILE at the Seychelles, in 1867, I made several collections of the Foraminifera met with while dredging. These were, for the most part, preserved in spirits of wine, and unfortunately were lost. One dredging, made in about eight fathoms of water, off the entrance of the harbour of Port Victoria, between the island of St. Anne and Long Island, however, was preserved in a dry state; the bottom consisted for the most part of a coarse white sand, mixed with fragments of shells, spicules of Alcyonarians, and fragments of coral, and evidently contained numbers of Foraminifera. A little bottle of dredged stuff from Mahé harbour turned up subsequently; and the mud and sand washed from the corals and echinoderms which were brought home helped to make up a more or less representative batch of material. The whole was forwarded to my friend Henry B. Brady, F.R.S., of Newcastle-on-Tyne, for examination; and I am indebted to him for the following list of the species found and the accompanying notes upon them.

Seychelles Foraminifera.

1. Cornuspira foliacea, Philippi, sp. (1844, Orbis foliaceus, Enum. Moll. Sicil. vol. ii. p. 147, pl. 24. fig. 26). Medium-sized specimens, rare.

2. Biloculina elongata, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 298. no. 1). Rare.

3. Biloculina contraria, D'Orbigny (1846, For. Foss. Vienne, p. 266, pl. 16. figs. 4-6). Very rare.

4. Triloculina trigonula, Lamarck, sp. (1804, Miliolites trigonula, Ann. Mus. vol. v. p. 351. no. 3).

Rare.

5. Triloculina oblonga, Montagu, sp. (1803, Vermiculum oblongum, Test. Brit. p. 522, pl. 14. fig. 9). Rare.

6. Triloculina Brongniartiana, D'Orbigny (1840, Foram. Cuba, p. 156, pl. 10. figs. 6-8). Somewhat rare.

7. Quinqueloculina seminulum, Linné, sp. (1767, Serpula seminulum, Syst. Nat. 12th ed. p. 1264. no. 791). Rather common. Also several specimens of a concave variety, with thick margin, not, answering very well to any figured species.

8. Quinqueloculina secans, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 303. no. 43-Modèle no. 96). Rare.

9. Quinqueloculina subrotunda, Montagu, sp. (1803, Vermiculum subrotundum, Test. Brit. p. 521). Rare.

10. Quinqueloculina Ferussaci, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 301. no. 18-Modèle no. 32).

11. Quinqueloculina antillarum, D'Orbigny (1840, Foram. Cuba, p. 167, pl. 12. figs. 4-7). Rare.

12. Quinqueloculina agglutinans, D'Orbigny (1840, Foram. Cuba, p. 168, pl. 12. figs. 11-13). Very common.

13. Quinqueloculina reticulata, D'Orbigny, sp. (1826, Triloculina reticulata, Ann. Sci. Nat. vol. vii. p. 299. no. 9.-Soldani, Testaceographia, vol. i. part 3, p. 233, pl. 159. figs. bb, cc). Rare. 14. Quinqueloculina, sp. A beautiful variety, with the crenulate edges and surface of the Q. ornatissima of Karrer, but more compactly built and without longitudinal striation; undescribed, I think. Not uncommon.

15. Spiroloculina limbata, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 299. no. 12.-Soldani, Testaceographia, vol. ii. p. 54, pl. 19. fig. m). Rare.

16. Spiroloculina canaliculata, D'Orbigny (1846, For. Foss. Vienne, p. 269, pl. 16. figs. 10-12). Small, very rare.

17. Hauerina compressa, D'Orbigny (1846, For. Foss. Vienne, p. 119, pl. 5. figs. 25-27). Small, very rare.

18. Nubecularia lucifuga, Defrance (1825, Dict. des Sci. Nat. vol. xxv. p. 210; Atlas Zooph. pl. 44. fig. 3.-Blainville, Actinologie, pl. 66. fig. 3 a-d). Rare.

19. Alveolina sabulosa, Montfort, sp. (1808, Miliolites sabulosus, Conch. Syst. vol. i. p. 174). Small, rather rare.

20. Peneroplis pertusus, Forskål, sp. (1775, Nautilus pertusus, Descr. Anim. p. 125. no. 65). Rare.

21. Orbitolites complanata, Lamarck (1801, Anim. sans Vert. p. 376). Very common.

22. Placopsilina cenomana, D'Orbigny (1850, Prodr. Paléont. vol. ii. p. 185. no. 758). Very rare.

23. Lagena squamosa, Montagu, sp. (1803, Vermiculum squamosum, Test. Brit. p. 526, pl. 14. fig. 2). Small, very rare.

24. Lagena marginata, Walker & Jacob (1784, Serpula [Lagena] marginata, Test. Min. p. 3, pl. 1. fig. 7). Small, very rare. 25. Globigerina bulloides, D'Orbigny (1826, Ann. Sci. Nat. vol. vii.

p. 277. no. 1-Modèles nos. 17 & 76). Medium, rather rare. 26. Textularia agglutinans, D'Orbigny (1840, Foram. Cuba, p. 136,

pl. 1. figs. 17, 18, 32-34). Medium-sized specimens, common. 27. Textularia sagittula, Defrance (1824, Dict. des Sci. Nat. vol. xxxii. p. 177, liii. p. 344; Atlas Conch. pl. 13. fig. 5.-Blainville, Malacologie, p. 370, pl. 5. fig. 5). Common. Also some allied forms too obscure for determination.

28. Bolivina punctata, D'Orbigny (1839, Voy. Amér. Mérid. p. 63, pl. 8. figs. 10-12). Small, rare.

29. Verneuilina spinulosa, Reuss (1849, Denkschr. Akad. Wissensch. Wien, vol. i. p. 374, pl. 47. fig. 12). Medium, rare. 30. Pavonina flabelliformis, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 260. no. 1, pl. 10. figs. 10-12). A single specimen was found of this very interesting form, originally figured by D'Orbigny, loc. cit., with Madagascar as its only locality, and not since recorded by any observer that I know of. It has a conspicuously perforate hyaline test; so that the suggested affinity to Peneroplis (Parker & Jones, Ann. & Mag. Nat. Hist. ser. 3, vol. xii.

p. 440. no. 16) is not confirmed. It is difficult from a single specimen to give the species a position; but that it belongs either to the family Lagenida or Globigerinida there can be little doubt. The original generic name Pavonia was changed to Pavonina in the "Vienna Basin" monograph, the former term having been employed by botanists for a genus of plants. 31. Discorbina globularis, D'Orbigny, sp. (1826, Rosalina globularis, Ann. Sci. Nat. vol. vii. p. 271. n. 1, pl. 13. figs. 1-4). Medium,

rare.

32. Planorbulina farcta, Fichtel & Moll, sp. (1803, Nautilus farctus, Test. Micr. p. 64, pl. 9. figs. g-i). Medium, rare.

33. Planorbulina larvata, Parker & Jones (1865, Phil. Trans. p. 380, pl. 19. fig. 3, a, b). Rare.

34. Planorbulina, sp. An acervuline specimen not unlike Tinoporus lucidus, Brady.

35. Pulvinulina repanda, Fichtel & Moll, sp. (1803, Nautilus repandus, Test. Micr. p. 35, pl. 3. figs. a-d). Rare.

36. Pulvinulina canariensis, D'Orbigny, sp. (Rotalina canariensis, d'Orb., 1839, Foram. Canaries, p. 130, pl. 1. figs. 34-36). Very rare.

37. Rotalia Beccarü, Linné, sp. (1767, Nautilus Beccarii, Syst. Nat. 12th ed. p. 1162. no. 276). Small, rare.

38. Rotalia orbicularis, D'Orbigny, sp. (1826, Gyroidina orbicularis, Ann. Sci. Nat. vol. vii. p. 278. no. 1 Modèle no. 13). Small, very rare.

39. Cymbalopora Poeyi, D'Orbigny, sp. (Rosalina Poeyi, D'Orb. 1840, Foram. Cuba, p. 100, pl. 3. figs. 18-20). Large, very common. 40. Tinoporus laevis, Parker & Jones (1860, Orbitolina lavis, Ann.

& Mag. Nat. Hist. 3rd ser. vol. vi. p. 33. no. 7). Large, rare. 41. Tinoporus vesicularis, Parker & Jones (1860, Orbitolina vesicularis, Ann. & Mag. Nat. Hist. 3rd ser. vol. vi. p. 33. no. 5). Very rare.

42. Polytrema miniaceum, Linné, sp. (1788, Syst. Naturæ, ed. Gmelin, vol. vi. p. 3784.-Esper, 1797, Zooph. vol. i. pl. 17). Rare. 43. Patellina, sp., a minute discoidal form, resembling a septate Spirillina, not corresponding with any figured species I can refer to. Very rare.

44. Polystomella crispa, Linné, sp. (1767, Nautilus crispus, Syst. Nat. 12th ed. p. 1162). Small, rare.

45. Polystomella striatopunctata, Fichtel & Moll, sp. (1803, Nautilus striatopunctatus, Test. Micr. p. 61, pl. 9. figs. a–c). Small, very rare.

46. Nonionina asterizans, Fichtel & Moll, sp. (1803, Nautilus asterizans, Test. Micr. p. 37, pl. 3. figs. e-h). Small, very

rare.

47. Nonionina scapha, Fichtel & Moll, sp. (1803, Nautilus scapha, Test. Micr. p. 105, pl. 19. figs. d-f). Medium, very rare. 48. Amphistegina vulgaris, D'Orbigny (1826, Ann. Sci. Nat. vol. vii. p. 305. no. 8-Modèle no. 40). Small, common.

49. Heterostegina depressa, D'Orbigny (1828, Ann. Sci. Nat. vol. vii.