22 



Pachyrhizodus kingii. 

 Pachyrhizodus leptopsis 

 Pachyrhizodus sheareri. 

 Tetheodus pephredo. 

 Enchodus petrosus. 

 Enchodus dolichus. 

 Enchodus anccps. 

 Enchodus calliodon. 

 Enchodus shumardii. 

 Phasganodus dirus. 

 Phasganodus gladiolus. 

 Phasganodus carinatus. 

 Empo nep&olica. 

 Empo semianceps. 

 Empo contracta. 

 Empo merrillii. 

 Stratodus apicalis. 

 Elasmobkanchii. 

 Ptychodus janevaii. 

 Ptychodus poly gyrus. 

 Ptych odus occidc n talis. 

 Ptychodus morton ii. 

 Ptychodus wh ippleyi. 

 Galeocerdo crassidens. 

 Galeocerdo hartvellii. 

 Otodus divaricat us. 

 Oxyrhina extenta. 

 Lamna cuspidata. 

 Lamna mudgei. 

 Lam mi macrorh iza 48 



Total number of species bd 



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

 sostomous Actinopteri ; and there is no species of a physoclystous family in I lie 

 list. No trace of spines or scales of fishes of the latter character have been 

 yet discovered iii strata of this period in the West, though one [Beryx 



