170 



NEW YORK STATE MUSEUM 

 PLATE 14 



3 4 



Poterioceras sauridens sp. nov. 



Page 93 



1-3 Three views of an internal cast of the living chamber and the 

 two latest camerae, showing the aperture, contraction 

 of living chamber, transversely oval section and position of 

 siphuncle 



4 Ventral view of another internal cast, showing the depth of 



the septum 



5 Internal cast and mold of a nearly complete individual, show- 



ing hyponomic indenture of aperture, a greater number 

 of camerae and form of conch 



Originals of fig. 1-5 are from the Lower Shelby bed (N. Y. 

 State Museum). 



