68 THE NAUTILUS. 



" It differs notably from any thing we have, and is probably, as you 

 suppose, an uudescribed species, unless described as a fossil. We 

 have specimens of the ventricose varieties of S. Sti7n2)soni, which 

 equal this in stoutness, and nearly equal it in curvature of the col- 

 umella, but the whorls are less ventricose, the shoulder less swollen, 

 the sutural region less deep, and the sculjiture is very much finer." 



Comparisons have also been made by myself with the Atlantic 

 Siphos in the U. S. National Museum, and of course with the recent 

 and fossil series in the collection of the Academy. 



SHELLS OF HENRY CO., INDIANA. 



BY E. PLEAS. 



To judge from such works on the Mollusca as I have had access to, 

 Indiana has not been regarded as having a Molluscan fauna worthy 

 of the attention of the Conchologist. It is not often mentioned in 

 giving localities. W. G. Binney in his very valuable Manual of 

 Am. Land Shells, prints a list of his large collection as jDresented to 

 the Smithsonian Institute ; some 312 species and varieties, only men- 

 tions a beggarly 4 : Zonites Juliginos\is, Pcdula solitaria, Triodopsis 

 ajipressa and T. wflecta as hailing from the Hoosier State. 



I have been a student and collector of Mollusca for several years 

 and have made it a point to secure our home shells first, and am able 

 to present the following list collected within 5 miles of my residence 

 near Dunreith, Indiana, 

 Mesodon albolabris Say. striatella Anth. 



elevatus Say. Polygyra leporina, Gould. 



thyroides Say. Stenotrema stenotremum Fer. 



" var bucculenta. monodon Rack. 



Mesoden exoletus Binn. " var. leaii. 



profundus Say. " var. fraternum. 



multiliueatus Say. hirsutum Say. 



Sayii Binn. maxillata? Gould. 



clausus Say. Triodopsis fallax Say. 



pennsylvanicus Green. tridental a " 



Patula alternata Say. palliata " 



" var. carinata. inflecta " 



perspecliva Say. appressa " 



solitaria " Zonites ligerus Say. 



