542 



NEW YORK STATE MUSEUM 



Endoceras (?) hudsoni sp. now 



Page 421 



I Natural section of type specimen showing the siphuncle in the 

 lower end, the chambers and the organic deposits in the upper 

 At the lower right side the mammillate surface of the deposits 

 is shown, in the upper part of the section the extent of the 

 organic deposition within the chambers. The middle lines in 

 the chambers are the pseudosepta 

 The original is from the dove-colored Chazy limestone of the east 

 shore of Yalcour island, N. Y. and now in the Xew York State 

 Museum. 



