176 



FIG. 

 I 



3 

 4 



5 



NEW YORK STATE MUSEUM 

 PLATE 17 



Cyrtorhizoceras curvicameratum sp. nov. 



Page 90 



Dorsal view of internal cast of living chamber (see fig. 7) 

 Section of aperture of same, showing the lateral compression 



of the living chamber 

 Septal view of same, showing marginal position of siphuncle 

 Septal view of another, somewhat rounded form (see fig. 6) 

 Specimen which shows the direction of septal sutures, depth 



of camerae, position of, and slightly expanded siphuncle 

 Internal cast, showing the living chamber and the ventral lobe 



of the sutures 

 Internal cast of living chamber of large individual, showing 



the aperture, the strong curvature of the last septum and the 



curvature of the chamber 



