Proceedings of the Biological Society of Washington, 17. köide

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Biological Society of Washington, 1905

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Page 6 - ... eighteen of which occur upon the second, twenty on the third and eighteen upon the penultimate whorl. The ribs are best developed near the summits of the whorls and scarcely extend to the periphery. Spiral lirations low, rounded, subequal, about twelve occur between the sutures upon the third and the penultimate whorls. These spiral lirations like the axial ribs appear strongest near the summits of the whorls. Periphery and base of the last whorl well rounded, the latter ornamented by about eleven...
Page 49 - OSGOOD, Proc. Biol. Soc. Washington, vol. 17, p. 75. March 21, 1904. TYPE LOCALITY.— Hacienda la Parada, San Luis Potosi, Mexico. RANGE. — Middle part of the Mexican table-land in the States of San Luis Potosi, Zacatecas, and Nuevo Leon.
Page 38 - XVII, pp. 53, 54, fig. 1, March 21, 1904. Type. — Peromyscus eremicus (Baird), from Fort Yuma, California. Characters. — Size medium or small; pelage usually very soft and silky; tail longer than head and body, subterete, rather thinly haired; soles of hind feet naked (at least in median line) to calcaneum, 6-tuberculate and paved with minute imbricate scales; skull with cranium rather large and rostral region relatively weak; first and second upper molars with three salient and two reentrant...
Page 6 - Wash., vol. 17, 1904, p. 16. Shell elongate-conic, subdiaphanous to milk-white. Nuclear whorls quite large, at least two about three-fourths obliquely immersed. Post-nuclear whorls rather broad between the sutures, well rounded, faintly shouldered at the summit, ornamented with depressed, rounded, rather broad axial ribs, about 18 of which occur upon the second, 20 on the third, and 18 upon the penultimate whorl.
Page v - Gastropods with the radula absent or obsolete ; the operculum ovoid paucispiral, with the apex anterior, a thread-like arcuate ridge on the proximal side, the inner margin notched in harmony with the plaits of the pillar when prominent; foot short, moderately pointed behind, with a small operculigerous lobe above and sometimes a small tentacular appendix on each side, in front feebly auriculate or undulate; mantle feebly canaliferous on the right upper margin; a single branchia; verge subcylindric,...
Page 127 - The same principle which is involved in § 6 will apply to § 8. § 8. If the later name be so defined as to be equal in extent to two or more previously published genera, it must be cancelled in toto.
Page 47 - ... underparts deep blackish slate washed with creamy white, producing an effect which varies from olive gray to slate gray; pectoral region usually rich cinnamon rufous; an intense black line extending from nostrils through base of whiskers and eye; tail covered with short, bristly, blackish hairs scarcely paler below than above; scaly annulations of tail usually dusky all around, sometimes with slight irregular patches of paler; fore and hind feet dusky brownish to base of toes. Skull.
Page v - ... in the larger forms, the funicles with a ciliated area; eyes behind or between the bases of the tentacles; below the tentacles an oral orifice from which extends a long retractile subcylindric proboscis, but there is no muzzle like that of Scala; below the oral orifice is an organ named by Loven the mentum, which is usually more or less medially grooved or fissured, and hence, at its anterior end, more or less bilobate, and extensile or retractile before or behind the front margin of the foot....
Page 45 - General effect of npperparts uniform clay color produced by a ground color of ochraceous buff and a fine peppery mixture of dusky: lateral line rather broad, ochraceous buff; forehead and orbital region from posterior base of whiskers to ear grayish; anterior base of whiskers...
Page 4 - Periphery and base of the last whorl well rounded, the latter with a minute umbilical chink. Aperture auricular, somewhat effuse anteriorly, posterior angle scarcely acute; outer lip very thick, reflexed, pillar with a broad, strong, oblique fold, a little anterior to its insertion; parietal wall covered by a thick callus. The type has six post-nuclear whorls, and measures: Length 9.9 mm., diameter 5 mm. It was collected by Krause at Killisnoo, which is in Alaska, and not in Japan, as stated by Clessin....

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