FOSSIL FISHES. 



35 



and in advance of the pectorals, which are very small. ($e<9 "Wood- 

 cut, Fig. 55.) 



The Cyttidce — fishes of the " Dory "* family — are represented by 

 the genus Zeus in the Miocene Tertiary of Licata in Sicily. 



The CorypJicenidcB — (Dolphins, Sun-fish) — are known in a fossil 



Fig. 55. — Semiophorus velicans, Agassiz, from the Eocene-formation of Monte Bolca. a, Anal 

 fin ; c, caudal ; D, dorsal ; p, pectoral ; v, ventral fins. 



state by the genus Goniognatlius, from the London Clay of the Isle 

 of Sheppey, and by the curious "Thread-fin," Gasteronemus, from 

 the Eocene Tertiary of Monte Bolca near Yerona. 



* Commonly called "John Dorys," being a corruption of the Gascon word 

 "Jan," a cock, and the French word "doree," gilded; hence the name means 

 really "Gilt-Cock." (Giinther.) 



D 2 



