American Journal of Conchology, 1866. 



Plate 



/p^TA/J^ 



Lingual Dentition, 



Fig. 1. Ancylotua prcarosm, Say. Fig. 3. AncyloUis dimmilis, Say. 

 "2. " costatus, Anth. " 4. Goniobasis depygis, Say. 



