152 



Report of the State Geologist. 



PLATE V. 



Manticoceras bhynchostoma, sp. nov. 



(See Plate IV.) 



An adult shell preserving the apertural margin. In this remarkable speci- 

 men the auriculate expansion of the aperture is situated nearer 

 the umbilical margin than it seems to be in M antic, oxy (see 

 figure 3 on plate I). The body whorl is laterally compressed but 

 not carinate on the venter, as in Mantic. oxy, but in this respect is 

 very similar to Mantic. Patterson i. 



From Big Sister creek, Erie county. 



