578 



NEW YORK STATE MUSEUM 



Deltoceras vaningeni sp. nov. 



Page 480 

 See pi. 26, 27, 28 



I Exterior view of the type ; showing the rate of growth, the depth 

 of chambers, direction of sutures and evolution of the gerontic 

 living chamber 



The original is from the lower Chazy limestone (B 4 of the section 

 on page 398) at the Valcour shore and now in the New York 

 State Museum. 



