30 THE NAUTILUS. 



Figs. 12-13 A. tardus Say. Columbia, Pa. 



Figs. 14-16 " Tuscawaras River, Ohio. 



Figs. 17-19 " Plaster Creek, Kent Co., Mich. 



Figs. 20-22 " Rockford, 



A NEW OMPHALINA FROM ALABAMA. 



BY GEO. H. CLAPP. 



Omphalina pilsbryi n. sp. 



Shell about the size and general contour of 0. fuliginosa ; umbili- 

 cate, color rich reddish-chestnut with a dull satiny luster above, 

 smoother and more polished below. Strife of growth fine and close, 

 crossed by microscopic granules in spiral series like beads, giving 

 the upper surface a dull luster; below the granules are obsolete and 

 the surface polished. Apex smooth, and in all adult specimens seen 

 denuded of the epidermis. Whorls 5^, rather flattened and slowly 

 increasing, the last whorl very much wider, more than double the 

 width of the preceding one, almost round, no flattening on the base. 

 Aperture oblique, circular. No thickening at the lip, which is 

 darker than the balance of the shell. 



Greater diameter 27, lesser 23^, altitude 1 7^ mm. Oblique 

 height of aperture 14, width 14 mm. 



Greater diam. 24, lesser 21, alt. 14.5 mm. 



On hillsides in woods around Wetumpka, Ala. Collected by 

 Herbert H. Smith. 



From above this shell has much the appearance of the large granu- 

 lated variety of 0. Icevigata found with it, but it lacks the close ribs 

 of that species, and the embryonic whorls are smooth, while in 

 Icevigata they are sharply ribbed. On the base the resemblance is 

 less striking, as Isevigata. has a very small umbilicus, the base is 

 flattened, and the internal white thickening makes the base several 

 shades lighter than the upper surface. 



This is one of the finest of the Omphafinas, and while it is quite 

 common around Wetumpka, it appears to have been entirely over- 

 looked by collectors. I take great pleasure in naming it after Dr. 

 H. A. Pilsbry, who is doing so much to clear up the dark places in 

 American Conchology. Type in my collection, and cotypes in the col- 

 lections of the Academy of Natural Sciences, National Museum, etc. 



