30 



FOSSIL FISHES. 



4. The Arnioidei. 



In Wall-case 15, and Table-cases 45, 46, and 47, are arranged the 



Fig. 4S. — Stemmatodus (Pycnodus) rhombus, Oolite. 



fossil fish referred to the Amiodei, Leptolepis (Fig. 50), Thrissops, 

 Megalurns, Oligopleurus, from strata of Jurassic age. 



Fig. 49,—Caturusfurcatus, Lithographic Stone, Upper white Jura, Solenhofen. p, Pectoral 

 fins ; v, ventral fins ; a, the anal fin ; d, dorsal fin ; c, caudal fin. Just above v aro seen the 

 pelvic bones. 



Protamia and Hypamia, from the Tertiary deposits of North 

 America, are clearly allied to Amia. 



Fig. 50.— Leptolepis sprattiformis, Lithographic Stone, Solenhofcn. p, Pectoral fins ; 

 v, ventral fins ; a, anal fin ; d, dorsal fin ; c, caudal or tail-fin. 



