Nadtilus magister. 
Page 422. 
See Plates 105, 107, 108. 
1. Lateral view of a large rotund specimen, preserving the inner volutions and a large part of the grand 
chamber. The septa are replaced with crystalline matter and are very much broken at the 
margins. From the Hamilton group on the shore of Lake Erie. Hamburgh , Hrie county, N. Y. 
