CASE-AMPHIBIA AND PISCES 



16 



«'?t-6^ 



2a 



1-2(7, Sphrrrolepis arctata (Cope). 

 1, la, lb. Complete dentigerous plate, in upper, under, and side views, natural size. 



Vermilion Co., 111. No. 6512 Univ. of Chicago, 

 2,2a. Fragmentary dentigerous plate, in upper and side views. X 2. Type. Vermilion 

 Co., 111. No. 6511 Univ. of Chicago. 

 3-3 A. Megalichthys nit id us (Cope). X %. 



Head of type specimen viewed from in front (fig. 3(7), from below (fig. 3) and from 

 the right side (fig. 36). Texas. No. 7239 Am. Mus. 



