572 NEW YORK STATE MUSEUM 



Tarphyceras clarkei sp. no v. 



Page 470 



I Exterior view of the type, showing its rate of growth, smooth 



exterior and evokite gerontic volution 

 The original is from the Fort Cassin beds at Valcour N. Y. (A3 of 



the section on page 397) and now in the New York State 



Museum. 



1 



