Fischer in his work on the Derotremes and Perennibranchs describes a peculiar branch of the seventh cranial nerve in Amphiuma, distributed, according to his statement, to the hyotrachealis muscle. Kingsley in his recent paper on the cranial nerves of Amphiuma agrees with Fischer that the nerve is one having no homologue in other Amphibians. According to him the nerve ends in the dorsotrachealis muscle. My own observations are so at variance with the views of these two writers that the following detailed account of the course of this extraordinary nerve is hereby given. Observations were made upon specimens of Amphiuma at different stages. A projection of the cranial nerves of a 130 mm. specimen was made by plotting of serial sections. While the material had been neither preserved nor stained with a view to tracing nerve components, yet it gave results far better than was to be expected.
Proceedings of the Iowa Academy of Science
©1903 Iowa Academy of Science, Inc.
Norris, H. W.
"The So-Called Dorsotrachealis Branch of the Seventh Cranial Nerve in Amphiuma,"
Proceedings of the Iowa Academy of Science, 11(1), 95-97.
Available at: https://scholarworks.uni.edu/pias/vol11/iss1/13