. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 .MARY |. ROSS. yolk disappears from them first, hence there is little space left for the formation of excretory ducts. The glands, then, are shorter and more flask-shaped than in the Desmognathus, though here too are found simple tubular glands. Bensley ('oo) describes the gastric glands of Amblystoma as "tubular downgrowths " of entoderm. "The anterior glands," he says, " are of a flask like shape and have a distinct ; }'/;^V \£& lr^?,: Wrn^^Jawj •- "''. FIG. 21. a., the gland
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 .MARY |. ROSS. yolk disappears from them first, hence there is little space left for the formation of excretory ducts. The glands, then, are shorter and more flask-shaped than in the Desmognathus, though here too are found simple tubular glands. Bensley ('oo) describes the gastric glands of Amblystoma as "tubular downgrowths " of entoderm. "The anterior glands," he says, " are of a flask like shape and have a distinct ; }'/;^V \£& lr^?,: Wrn^^Jawj •- "''. FIG. 21. a., the gland fundament has increased in size very rapidly and now has a central lumen ; d., the duct has not developed to a corresponding extent, being as yet only a shallow pit; ep., the epithelial cells are becoming radially arranged around the gland fundament as an axis ; /., central lumen ; y., the yolk is still present in the epithelial cells of the surface, though it has almost disappeared from the gland cells. Obj. T's, Oc. 2. " The posterior glands are simple tubes, composed of a simple layer of yolk-filled cells surrounding a cleft like ; From the glands described and figured by Bensley it seems probable that the "cleft like lumen," with the nuclei arranged as if sur-. 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 report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
