The American Naturalist, 35. köide,2. osaEssex Institute, 1900 |
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Page 538
... points of difference from the related species of Pelomyxa will be discussed later . - Description of Pelomyxa carolinensis . Habitus . The body , when viewed by reflected light , is white and conspicuous . When left for some time ...
... points of difference from the related species of Pelomyxa will be discussed later . - Description of Pelomyxa carolinensis . Habitus . The body , when viewed by reflected light , is white and conspicuous . When left for some time ...
Page 540
... points . freely into water . One millimetre drawn to same scale . FIG . 7.-P. car , as an opaque object . Body thrown into two right angles with each other . Body rests on bottom ( indicated by lines ) at four points , one pseudopodium ...
... points . freely into water . One millimetre drawn to same scale . FIG . 7.-P. car , as an opaque object . Body thrown into two right angles with each other . Body rests on bottom ( indicated by lines ) at four points , one pseudopodium ...
Page 546
... points of intersection of the reticular lines ( lamellæ of Bütschli ) , or whether each ( appar- ently ) linear side of a mesh included a short row of microsomes . Dispersed in this delicate reticulum , which seems identical with that ...
... points of intersection of the reticular lines ( lamellæ of Bütschli ) , or whether each ( appar- ently ) linear side of a mesh included a short row of microsomes . Dispersed in this delicate reticulum , which seems identical with that ...
Page 548
... points ( Figs . 3-7 ) . At such times a locomotory motion , if it existed , escaped my notice . The animal was at rest for sufficiently long periods of time to permit careful study and drawing . When the body is linear and applied ...
... points ( Figs . 3-7 ) . At such times a locomotory motion , if it existed , escaped my notice . The animal was at rest for sufficiently long periods of time to permit careful study and drawing . When the body is linear and applied ...
Page 554
... points in the anat- omy of the axolotl , on which at present only the most scanty information is in print . I hope to make this material the sub- ject of a second paper , which will follow this one at a later date . I desire in this ...
... points in the anat- omy of the axolotl , on which at present only the most scanty information is in print . I hope to make this material the sub- ject of a second paper , which will follow this one at a later date . I desire in this ...
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Acad adult American anatomy animal anlage antennæ ants appear arch axolotl birds body botany Boulenger Bull Bulletin Carapace cavity cells character colonies column condition Crustacea described diameter dinosaurs dorsal Eciton ectoderm eggs elongate embryo epithelium fauna female folds frog ganglion genera genus gills gland groove hatched hind hind-brain hooks Iapyx insect intestine irradians Journ Lake larvæ lateral layer leaf legs length limbs male margin maxillipeds median muscle muscularis mucosa Museum nerve nest normal Nototrema nucleus observed oral disk organs pair Palpigradi Pelomyxas pharynx plants plates posterior present Proc Professor pseudopodia region resemblances ribs ridges right valve shell side species specimens spines spiral valve statoblasts structure suckers sucking disk surface tadpoles tail tentacles tion tissue trematodes trigeminal ganglion U. S. Fish Commission variation vein ventral vertebrate villi Woods Holl Zool
Popular passages
Page 570 - Such a column is of enormous length, and contains many thousands if not millions of individuals. I have sometimes followed them up for two or three hundred yards without getting to the end. They make their temporary habitations in hollow trees, and sometimes underneath large fallen trunks that offer suitable hollows. A nest that I came across in the latter situation was open at one side. The ants were clustered together in a dense mass, like a great swarm of bees, hanging from the roof, but reaching...
Page 571 - ... at least a cubic yard in bulk, and contained hundreds of thousands of individuals, although many columns were outside, some bringing in the pupae of ants, others the legs and dissected bodies of various insects. I was surprised to see* in this living nest tubular passages leading down to the centre of the mass, kept open just as if it had been formed of inorganic materials. Down these holes the ants who were bringing in booty passed with their prey. I thrust a long stick down to the centre of...
Page 834 - Notes on the Mosquitoes of the United States : Giving Some Account of Their Structure and Biology, with Remarks on Remedies.
Page 804 - Mr. WA Cannon,* in discussing a Cecidomyid gall on the Monterey pine, says that the "larvae take their food only by absorption through the surface of the body...
Page 830 - No. 23 of the Division of Agrostology of the United States Department of Agriculture.
Page 712 - 66 OWEN, RICHARD. Anatomy of Vertebrates. Vol. i, p. 515. '86 PACKARD, AS Zoology. 1886. '77 PARKER, WK On the Structure and Development of the Skull in the Batrachia. Phil. Trans. Vol. clxvi, Pt. 2. '75 PETERS. Ueber die von Herrn Buchholtz in West-Afrika gesammelten Amphibien.
Page 986 - HOW TO KNOW THE WILD FLOWERS. A Guide to the Names, Haunts, and Habits of our Common Wild Flowers. By Mrs. WILLIAM STARR DANA.
Page 870 - P. squamosvs, in which the scales are becoming obsolete in the adult, they are found at a later stage on the right valve than on the left. In other cases the grooves of the left valve divide and become ornamented while the right valve remains simple. Here, then, the index of variability is an index of phylogenetic changeableness.
Page 817 - ... creature a little way off; the wasp came out, brought it to the opening as before, and went within a second time. This was repeated again and again until the patience of the naturalist was exhausted, and the persistent wasp took her booty in after her appropriate fashion. She must place the grasshopper just so close to the doorway, she must then descend and examine the nest, and after that must come out and drag it down. Nothing less than the performance of these acts in a certain order satisfies...
Page 781 - Vogt believes that certain dinosaurs were leaping or perching animals, and infers that the avian characters of the pelvis and hind limbs thus came to be evolved from community of habit with birds. He is, however, not indisposed to see in dinosaurs possible parents of the ratites ; while the Archaeopteryx would be the ancestor of the birds that fly." In 1882 Dollo also ('82, '83) advanced the more modern idea that the resemblances in the pelvis and hind limbs might as well be considered adaptive as...