570 NEW YORK STATE MUSEUM 



Tarphyceras seelyi Whitfield (sp.) 



Page 465 

 See pi. 19, fig. I, 2; pi. 20, fig. s; 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. (A3 of 

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





