138 



CATALOG OF FOSSIL FISHES IN THE MUSEUM 



achse," and represents it as extending the whole length of the web, 

 and, in fact, projecting a little beyond. He regards it as a m3^o- 

 pterygium, aoid says it terminated in small hooks.^ 



In our specimen the axial rod begins at a distance of no mm. 

 behind the anterior extremity of the fin base, and it has a length 

 (measured from the posteriormost radial) of 50 mm. It shows two 

 or three very vague transverse lines; but these are probably mere 

 breaks in the superficial film of the fossil and not an actual segmen- 

 tation of the rod. 



Cladoselache newberryi Dean 



(Text-fig. 49) 



This species has hitherto been known only by the type specimen, 

 an incomplete small shark, which is perhaps only an immature indi- 

 vidual of some other Ohio species. Its status has not been adequately 

 defined, but for the present we retain it provisionally as distinct. 



Fig. 49. Cladoselache newberryi. Pectoral Fin, Natxtral Size 



The posterior margin was outlined in pencil in the specimen before photo- 

 graphing. E 2483. 



E 2483 A fragment of a shark exhibiting both pectorals. The base 

 of the pectoral (fig. 49), measures 6.5 cm., and its length 

 5 cm. It shows 13 primary, and 2 or 3 secondary rays. 



