Contributions from the Biological Laboratories in Princeton University, Volume 5Princeton University Press, 1916 Consists of reprints of articles from various journals. |
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acetone Activated half alcohol Anat angioblast anlage aortic arch appearance bacteria blood cells butyric acid capillaries cardino-Cuvierian caudal end centrifugal chemical chick chromatin circulation coccygeal veins concrescence cyclopia differentiated dorsal aorta efferent aortic arch eggs electroplax endothelial endothelium erythrocytes experimental experiments fish gorgonians half disk Half with S. O. Half without S. O. Hyoidean artery independent anlagen injected embryo intra-embryonic lateral pharyngeal lymphatic lymph vesicles lymphatic system medial pharyngeal membrane mesenchymal cells metabolism nerve-cells normal nucleus observed otic communication otic lymph sac otocyst phatic phosphoresce photogen plasmosome polar bodies Precardinal or jugular precardinal vein rainbow trout rainbow trout embryo rate of regeneration reef region sea water sea-water sense organs shown side solitary eye solution specimens spermatozoon stage stained steelhead trout Stockard subocular lymph sacs substance teleost thoracic duct tion Torpedo marmorata Torpedo ocellata transverse section vascular venous yolk-sac
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Página 485 - Zool., vol. 1. . 1905. Studies on regulation, IX. The positions and proportions of parts during regulation in Cestoplana in the presence of the cephalic ganglia.
Página 607 - ... of twenty analyses were made of the gorgonians growing upon a square yard of the surface of widely separated reefs. The bulk of the gorgonians varied from 1.5 pounds to 25.0 pounds, the spicule content from 0.45 pounds to 6.94 pounds, for the different squares. The average for all determinations was 7.746 pounds of gorgonian colonies containing 2.1225 pounds of spicules. 2. Distribution of gorgonians on the reefs about Tortugas. To determine the distribution of the species of gorgonians included...
Página 72 - AND MCWHORTER, JE 1914 Experiments on the development of blood vessels in the area pellucida and embryonic body of the chick. Anat. Rec., vol. 8.
Página 607 - ... gorgonians varied from 1.5 pounds to 25.0 pounds, the spicule content from 0.45 pounds to 6.94 pounds, for the different squares. The average for all determinations was 7.746 pounds of gorgonian colonies containing 2.1225 pounds of spicules. 2. Distribution of gorgonians on the reefs about Tortugas. To determine the distribution of the species of gorgonians included in the foregoing analyses on the reefs about Tortugas a series of lines were laid out extending over a number of the most important...
Página 490 - Indeed as long as an egg remains alive this stratification is never complete and the boundaries of the zones are neither plane surfaces nor are they sharply delimited as is the case in dead eggs which have been centrifuged. In Crepidula this denser and more resistant part of the protoplasm is found in the nucleus and centrosphere, in a thin peripheral layer which retains its position as long as the egg remains unbroken, and in a framework of strands which runs through the cell and connects the nucleus...
Página 487 - November 16. 1915. Received. January 22, 1916 . If the eggs of the marine gasteropod Crepidula plana are subjected to centrifugal force of approximately two thousand times gravity the yolk is thrown to the distal or centrifugal pole, the oil and other light substances to the centripetal pole, while the nucleus and centrosphere together with most of the cytoplasm occupy the middle zone between the other two. In eggs centrifuged after fertilization and before the first cleavage the yolk zone comprises...
Página 255 - FIG. 3. A living cell from Torpedo marmorata, No. 16, seen with 2 mm. apochromatic objective, under very slight pressure of cover-glass and with iris diaphragm well cut down to bring out refractive properties of cell-structures. Plasmosome, karyosomes, nuclear membrane, and neurosomes sharply brought out. Perichromosomes slightly brought out, and cytoplasm granules around nuclear membrane weakly brought out. Some trace of chromophyllic bodies to be seen; also of neurofibrils.