A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . Fig. 5160.—Transverse Section of an Embryo Paroquet (Melopsit-tacus) to show the Anterior or True Neurenteric Canal. Ec, Ec-toderm; M]i. myotome; Md., medullary canal; CT., uotochordpierced by the short neurenteric canal, ne.; entoderm ; mew.,mesoderm, (.\fter Max Brauu.) to be open at any period after the formation of theprimitive streak. Aiiotlier canal, which was first satisfactorily describedby Brauu,^ occurs in older embryos. TheEnddarmof Gasser and KOUik
A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . Fig. 5160.—Transverse Section of an Embryo Paroquet (Melopsit-tacus) to show the Anterior or True Neurenteric Canal. Ec, Ec-toderm; M]i. myotome; Md., medullary canal; CT., uotochordpierced by the short neurenteric canal, ne.; entoderm ; mew.,mesoderm, (.\fter Max Brauu.) to be open at any period after the formation of theprimitive streak. Aiiotlier canal, which was first satisfactorily describedby Brauu,^ occurs in older embryos. TheEnddarmof Gasser and KOUiker becomes the Schwanzdarm 495 I> REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. Am Fig. 5101.—Hecoiistniction of a Human Em-bryo mm. Long. Tlie amnion has beenopened to sbow the dorsal surface of theembryo. Yk, Yolk sac; Am, amnion ; plate; /•, dorsal furrow; ,neurenteric canal; , primitive groove ;, body stalk. (AfI er Count Spee.) (FromMInots ? Embryology, Blakiston, Phila.,1903.) (post-anal gtit, Balfour) of older embryos, which soonbecomes divided, at least in birds, into adilated terminalportion and a narrower neck communicating with theintestine proper. The posterior section then subdivides, and its narrowYk end segment lengthens outand unites withthe sjiinal canal wemay designate asBrauns is not improb-able that it isb o m o 1 o g o ti swith the amnio-allantoic canalof G a s s e r , which Rauber*has nicknamedthe Cochin Chi-na Ciinal, afterthe breed ofhens in which itseems most con-stant. In theone case we maysuppose the ca-nal to open af-ter, in the otherbefore, the clos-ure of the pos
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