554 



NEW YORK STATE MUSEUM 



Orthoceras vagum sp. nov. 



Page 4S5 

 See pi. 9, fig. 9 



I, 2 Two views of the type specimen showing its irregularly curv- 

 ing form, rate of growth, suture and depth of chambers 



3 Natural section of another specimen, showing the siphuncle and 

 depth of septa 



The original of figures I, 2 is from the dove-colored Chazy lime- 

 stone of the east shore of Valcour island and now in the New 

 York State Museum ; that of figure 3 is from the same horizon on 

 Isle La Motte Vt., and now in the American Museum of Natural 

 History in New York. 



