402 University Geological Survey of Kansas. 



PLATE LXIII. 



Fin-spines of Protosphyrazna penetrans (?), slightly under one-half natural 

 size. 



PLATE LXIV. 



Anog mius polymicrodus Stewart, one-half natural size: den, dentary; art, 

 articular; mx, maxilla; p mx, premaxilla; q, quadrate; ch, ceratohyal; sc, 

 sclerotic ring ; a, a, a, a, dermal plates; op, operculum; pop, preoperculum ; 

 iop, interoperculum ; sop, suboperculum; or, supposed orbital bones. 



PLATE LXV. 



Anogmius polymicrodus Stewart. 



Fig. 1. — Top view of skull, one-half natural size: fr, frontal; po,postorbital ; 

 pa, parietal; pt, pterotic: hmnd, hyomandibular. 



Fig. 2a, b. — First anterior vertebra, posterior and superior views. 



Fig. 3a, b. — Abdominal vertebrae, top and side views. 



Fig. 4. — Premaxilla. 



Fig. 5. — Condyle of quadrate. 



Fig. 6. — Superior view of cotylus. 

 Anogmius evolutus Cope. — Superior view of cotylus. 



Figs. 8, 9, 10. — Opercle and other bones, probably of Enchcdus. 



PLATE LXVI. 

 Anogmius polymicrodus Stewart. — Caudal fin, about one-half natural size. 



PLATE LXVII. 



Anogmius evolutive Cope, slightly under natural size: den, dentary; pal, 

 supposed palatine; mx, fragmentary maxilla; phar, supposed pharyngeal 

 bone of A. polymicrodus Stewart; a, bone of uncertain position. 



PLATE LXVIII. 



Pachyrhizodus latimentumf Cope, one-half natural size. 

 Fig. 1. — Right mandible : den, dentary; art, articular. 

 Fig. 2. — Premaxilla. 

 Fig. 3.— Maxilla. 

 Fig. 4. — Qaadrate. 



Fig. 5.— Condyle of quadrate, seen from below. 

 Figs. 6a, b, c. — Bones of uncertain position. 

 Fig. 7.— Vertebrae. 

 Fig. 8. — Glenoid portion of scapula. 



