﻿Review of the New York Geological Reports 



311 



Plate 34, p. 103, Hall's Report. 



T 



Homalonotus delphinocephalus . 



the matrix enclosing the two is very different, and though there 

 is some resemblance in the heads of the two species, he considers 



them quite distinct. 

 The following are the most common forms of Strophomena 



in the Niagara shale. 



