170 



NEW YORK STATE MUSEUM 

 PLATE 14 



FIG. 



i-3 



Poterioceras sauridens sp. nov. 



Page 93 



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). 



