BUFFALO SOCIETY OF NATURAL SCIENCES 131 



E 2477 A nearly complete fish. It exhibits only a single pectoral, 

 and this is partly destroyed owing to its having been 

 exposed in the concretion and having become weathered 

 before it was collected. It shows both orbits indicated 

 by the sclerotic rings; several (at least five) banks of 

 teeth, (it is seen that these teeth overlap at their bases) ; 

 also neural arches, and f ossihzed muscle-tissue, arranged 

 in segments, near the pectoral fins. In the region of the 

 alimentary canal some ingested matter is to be seen, 



Fig. 44. Cladoselache desmopterygms. Pectoral Fin of Specimen E. 2476 



including scales, and a striated tooth (the latter destroyed 

 in cleaning the specimen). 



The pectoral fin is large, elongated, and situated 

 relatively far back, as is characteristic of this species. 

 It shows 20 primary and 4 secondary rays. There are 

 also indications of tertiary rays, but they cannot be 

 counted. 



E 2478 Body of a shark, with the pectorals, ventrals, and one dor- 

 sal (fig. 45), probably belonging to C. desmopterygius. 



