BUFFALO SOCIETY OF NATURAE SCIENCES 



43 



writer were obtained the bones of practically the entire head of 

 an immense Dinichthys. 



Although the Rhinestreet and Cashaqua shales are totally 

 dissimilar in appearance and constituents, their line of contact is 

 indefinite. Seen in a cliff they show as two distinct and well 

 marked bands, but when closely examined they are found to 

 merge. The transition from the gray Cashaqua to the black 

 Rhinestreet is gradual through a foot or more of brown shale. 

 At many points this brown shale is high^ pyritiferous and 

 marks the contact by a rusty, ironstained band. This band is 

 frequently fossiliferous. 



F. Houghton, Photo. 



Fig. 18. Uppermost layer of Rhinestreet shale, Cazenozia creek, at Quaker 

 Road bridge. 



The contact of the Rhinestreet with the overlying Angola 

 shale is equally indefinite. These merge into one another 

 through recurring alternations of black and gray shales. I have 

 considered as the topmost layer of the Rhinestreet a hard black 

 layer capped by a layer of very large irregular flat concretions 

 set together so closely as to form a practically continuous bed. 

 This layer can best be seen in Cazenovia creek just above the 



