22 



i'drlii/rliizodus kingii. 

 Fackyrhizodus leptopsis 

 Pachyrhizodus sheareri. 

 Tetheodus j'ephredo. 

 Enchodus petrosus. 

 EncJwdus dolichus. 

 Enchodus anceps. 

 Encliodus calliodon. 

 Enchodus shumardti. 

 Phasganodus dims. 

 Phasganodus gladiolus. 

 Phasganodus carinatus. 

 Empo nepceolica. 

 ■ Empo semianceps. 

 Empo contracta. 

 Empo merrillii. 

 Stratodus apicalis. 

 b. Elasmobkanchii. 



Ptychodus janevaii. 



Ptychodus poly gyrus. 



Ptychodus occidcntnlis. 



Ptychodus mortonii. 



Ptychodus tvhijfpleyi. 



Galeocerdo crassidens. 



Galeocerdo linrtvellii. 



Otodus divaricatus. 



Oxyrhina exlenta. 



Lamna cuspidata. 



Lamna mudgei. 



Lamna macrorhiza 48 



Total number of species f- 9 



Of the preceding forty-eight species of fishes, the greater part are phy- 

 sostomous ActinoiHeri ; and there is no species of a physoclystous flxmily in the 

 list. No trace of spines or scales of fishes of the latter character liavc Ix-cii 

 yet discovered in si lata of this period in (lie West, thongh one {Bcn/x 



