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 evolute gerontic volution 

 The original is from the Fort Cassin beds at Valcour N. Y. (A 3 of 



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



Museum. 



