PLATE CXI.— Continued. 



Fig. 9. Upper lateral view of a fi-aginent, showing the curvature of the tube and the depth of the air- 

 chambers. The obscure fun-ows of the crenulations at the base of the chamber of habitation 

 are not represented. Schoharie grit. Sch"harle, N. T. 



Fig. 10. Ventral view of an individual, showing the evident departure from a symmetrical cui-vature, and 

 the large siphuncle expose<l in the process of weathering. Schoharie grit. Schoharie, N. Y. 



CyRXOCERAS METIILA. 

 rage 360. 

 See Plate 47. 

 Fig II. Lateral view of an individual preserving the chamber of habitation with twenty-seven attached air- 

 chamlieif, showing the form and curvature of the tube, the size of the grand chamber, ami the 

 depth of the air-chambers. The obscure furrows of the crenulations are shown over a portion 

 of the internal mould of the walls of the air-chambere. Upper Helderberg limestone. Little- 

 tUle, N. Y. 



