B lii'l'H 34, U. S NjtionjI Muji-um. Cop», Batrochia of Noilh America 



Plate III. 



"ir 



f>hyh'hy^^^^ c/j'r'c'dr'' 



i 



.1- epg 



nice-. 



px 



,m.np 



.--nil 



occ ^"-so 



Necturus and Cryptobranchus. 



