The specimen upon which the following description is based was 51 mm. in length. In the state of development of the skull it appears to be intermediate between the two stages described and illustrated by Winslow with figures of wax models. The chondrocranium appears to be almost exactly like that of the older specimen described by him, except that the ossification in my specimen is less advanced. The specimen was sectioned and a reconstruction of the skull was made after Bora's method.
Proceedings of the Iowa Academy of Sciences
©1902 Iowa Academy of Science, Inc.
Norris, H. W.
"The Membrane Bones in the Skull of a Young Amphiuma,"
Proceedings of the Iowa Academy of Science, 10(1), 69-74.
Available at: https://scholarworks.uni.edu/pias/vol10/iss1/13