128 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



5. Cladoselache fyleri 



6. Cladoselache kepleri 



7. Cladoselache newberryi 



All, excepting C. eastmani, wHich is from New York State, are from 

 the Cleveland shale (Upper Devonic), near Cleveland, Ohio. 



Cladoselache acanthopterygius Dean 



(PL 45, and text-fig. 43) 



[Mem. Amer. Mus., ix, 240, fig. 27, 1909] 



This is one of the rarest of the Cleveland shale sharks, easily 

 recognized by its narrow pectoral fins. A single specimen is in the 

 collection. 



Fig. 43. CladoselacJte acanthopterygius. Pectoral Fin, Nattxral Size. E. 2474 



The name acanthopterygius, is not a happy one, since it suggests 

 the presence of a spine on the fin, which of course is not the case 

 with any Cladoselachian; nor is the pectoral fin itself quite so 

 narrow as to resemble a spine (see fig. 43). 



E 2474 A large shark lacking the head. It shows the entire body as 

 far back as the caudal fin, both pectorals, and the caudal 

 lateral keels. A number of cladodont teeth are included 

 in the body in the region back of the pectorals; they are 

 either remains of a smaller shark which had been in- 

 gested, or teeth which have become shifted from the jaw 

 region of this specimen. 



