. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE YPSILOID APPARATUS OF URODELES. 265 fork slightly anterior to the first myocomma and the lateral arms extend obliquely across the third myotome. The musculature of the cartilage is interesting. Superficially, the first myotome of the rectus abdominis is imperfectly differen- tiated into two portions, and the medial fibers not only of the. FIG. 7. Dissection of Cryptubranckus allegkeniensis showing the ypsiloid carti- lage and the muscles associated with it, X 2^. The external oblique and rectus abdominis muscles have bee
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE YPSILOID APPARATUS OF URODELES. 265 fork slightly anterior to the first myocomma and the lateral arms extend obliquely across the third myotome. The musculature of the cartilage is interesting. Superficially, the first myotome of the rectus abdominis is imperfectly differen- tiated into two portions, and the medial fibers not only of the. FIG. 7. Dissection of Cryptubranckus allegkeniensis showing the ypsiloid carti- lage and the muscles associated with it, X 2^. The external oblique and rectus abdominis muscles have been removed from the left side. Abbreviations as in previous figures. first but of the second myotome are inserted into the stem of the cartilage, the more anterior fibers of the second monotome, however, being inserted into the ventral surface of the cartilage at the very base of the arms. The deeper layers show a strongly developed M. ypsi- loideus posterior, differing from that of the forms already de- scribed in that its insertion into the Cartilage ypsiloides extends only about two thirds the length of the arm, the thin, expanded, outer third of the arm being free from all muscu- lar attachment. The most medial fibers of the third myotome. 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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