. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE ORIGIN AND DEVELOPMENT OF GASTRIC GLANDS. 69 subject. The oesophageal glands of Urodcla have received more or less consideration as the question of the homology of these glands, with one another, and with those of higher forms has for a long time aroused much interest. But, leaving this interesting problem entirely out of the discussion, there are described in the stomach of some of the Urodela two kinds of glands, the an- terior and posterior oxyntic glands of Langley ('Si). Bensley ('oo), for Amblystoina, and Carlier (
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE ORIGIN AND DEVELOPMENT OF GASTRIC GLANDS. 69 subject. The oesophageal glands of Urodcla have received more or less consideration as the question of the homology of these glands, with one another, and with those of higher forms has for a long time aroused much interest. But, leaving this interesting problem entirely out of the discussion, there are described in the stomach of some of the Urodela two kinds of glands, the an- terior and posterior oxyntic glands of Langley ('Si). Bensley ('oo), for Amblystoina, and Carlier ('98), for Triton, have given excellent descriptions of these glands. In the adult form the 2 • - / jSjjMjiir''-"'. FIG. I. Transection through the fundus of the stomach of a larval Dcsmogna- tJnis, mm. Fixed in Gilson's, modified, a., gland anlage, "ovoid cell," just about to divide; , basement membrane; d., insinking at the surface of the epithelium to form the future excretory duct; ep., epithelial lining of the stomach, showing one of the cells in process of division; ;;/., mesodermic tissue forming the muscular layers about the stomach. This also shows mitoses. Obj. y'g, Oc. I. glands consist of a duct, composed of cells resembling the sur- face epithelium, a neck, composed of clear mucous cells, and a body, made up of granular cells containing large nuclei. The glands of the cardiac, fundic and pyloric regions vary in complex- ity but all resemble, to a greater or less extent, the type form just described. These anterior oxyntic, or cardiac glands, may or may not be transition forms between the true gastric glands and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual repo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
