570 



NEW YORK STATE MUSEUM 



Tarphyceras seelyi Whitfield (sp.) 



Page 465 



See pi. 19, fig. 1, 2; pi. 20, fig. 5; pi. 24, fig. 3 



I Exterior view of a large, mature, somewhat weathered specimen, 

 showing the absence of gerontic evolution of the whorls and 

 the rate of growth 



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

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



