GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 



147 



S t e n o s c li i s 111 a a 1 1 i p 1 i c a t u m [fig. 52] is readily dis- 

 tinguished by the abrupt anterior emargination due to the deep 

 folding sinus. It is, however, not so readil}^ distinguished from 

 S t e n o s c h i s ni a for m o s u m [fig. 53], which is a broader 

 and less triangular shell. 



Eatonia medialis [fig. 54] is a rhynchonelloid with an 

 abrupt and marked anterior deflection, and rounded plications 

 chiefly at the anterior margin. 



Among the smooth brachiopods are Meristella laevis 

 [fig. 55], M. a r c u a t a [fig. 56 and 5Grt] and M. princeps 



Fig-. 55 Meristella laevis 



[fig. 57], which are readily distinguished from one another by 

 their form and proportion and from the other brachiopods of this 

 horizon by the absence of surface striae or plications. 



A t r y p a reticularis [fig. 38] is abundant in this as in 

 the other formations. 



A number of pelec^^pods occur in this horizon, but on the 

 whole they are not common or well preserved. One of the most 

 readily recognized is A c t i n o p t e r i a t e x t i 1 i s [fig. 58] , 

 which is very oblique, with a strong posterior wing, and sharp 

 radiating striae cancellated by concentric lines. A. securi- 



