The American Naturalist, 35. köide,2. osaEssex Institute, 1900 |
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Page 537
... eye in a watch glass . In the same brown growth Sten- tor cæruleus was present in great numbers , and the Pelomyxas were feeding chiefly on these . In the Pelomyxas recognizable pieces of Stentor were commonly present , and sometimes a ...
... eye in a watch glass . In the same brown growth Sten- tor cæruleus was present in great numbers , and the Pelomyxas were feeding chiefly on these . In the Pelomyxas recognizable pieces of Stentor were commonly present , and sometimes a ...
Page 538
... eye , though better with the help of a simple lens and low objective . The body is very apt to assume an elongated , more or less rod - like shape , as in Fig . 1 ; sometimes enlarged at one end ( clavate ) , as in Fig . 2. The ...
... eye , though better with the help of a simple lens and low objective . The body is very apt to assume an elongated , more or less rod - like shape , as in Fig . 1 ; sometimes enlarged at one end ( clavate ) , as in Fig . 2. The ...
Page 542
... eye , no effort being made to discover young forms with the micro- scope . - Structure of the Body . There is a perfectly clear peripheral ( ectosarcal ) region , which in the living state is very narrow , being conspicuous only at the ...
... eye , no effort being made to discover young forms with the micro- scope . - Structure of the Body . There is a perfectly clear peripheral ( ectosarcal ) region , which in the living state is very narrow , being conspicuous only at the ...
Page 555
... eyes Width of head at eyes . Snout to line joining centers of eyes Length of filament - bearing border of first gill 66 66 66 66 46 " second gill “ third gill . . " arm " forearm " hand 66 66 66 . thigh " fore leg " foot 59 mm . 32 mm ...
... eyes Width of head at eyes . Snout to line joining centers of eyes Length of filament - bearing border of first gill 66 66 66 66 46 " second gill “ third gill . . " arm " forearm " hand 66 66 66 . thigh " fore leg " foot 59 mm . 32 mm ...
Page 558
... eyes is less than in the adult Amblystoma , where the eyes , instead of being located considerably inside of the margin of the face , are lateral . The area of the face , in front of the line connecting the centers of the eyes , is also ...
... eyes is less than in the adult Amblystoma , where the eyes , instead of being located considerably inside of the margin of the face , are lateral . The area of the face , in front of the line connecting the centers of the eyes , is also ...
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Common terms and phrases
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...