. Comparative anatomy. Anatomy, Comparative. /(SOMITES. C. SQUALUS ^YOUK Fig. 511.—Parasagittal sections showing the similarity of the relations of the anterior endodermic diverticula of Amphioxus (A) to those of the adhesive organ of Amia (B) and of the anterior somites of Squalus (C). Each of these "cavities" arises immediately in front of the first permanent myotome (somite i). are, in fact, serially homologous—at least in part—and have equal seg- mental value. This conclusion is supported by the resemblance of the anterior cavities to the anterior endodermic diverticula of amphio
. Comparative anatomy. Anatomy, Comparative. /(SOMITES. C. SQUALUS ^YOUK Fig. 511.—Parasagittal sections showing the similarity of the relations of the anterior endodermic diverticula of Amphioxus (A) to those of the adhesive organ of Amia (B) and of the anterior somites of Squalus (C). Each of these "cavities" arises immediately in front of the first permanent myotome (somite i). are, in fact, serially homologous—at least in part—and have equal seg- mental value. This conclusion is supported by the resemblance of the anterior cavities to the anterior endodermic diverticula of amphioxus. Like the latter they are the anteriormost cavities of the body and develop immediately anterior to the first permanent myotomes. The resemblance of the adhesive organs of amia to the anterior endodermic diverticula of amphioxus is even more striking. Both arise as paired endodermic diverticula of the anterior end of the preoral intestine. Both open by pores to the exterior, the left cavity in amphioxus forming the preoral 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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Keywords: ., bookcentury1900, bookpublisherphi, booksubjectanatomycomparative
