[106] 



ear-shaped lip, behind which it is constricted ; the base shows 

 nearly two whorls, and a minute perforation, and a deep groove 

 revolving on the inner side of the whorls ; aperture ear-shaped, 

 the peristome continuous and expanded, parietal tooth linguiform, 

 two lip teeth, the upper one of which is a submarginal perpen- 

 dicular lamella, and the basal one an oblique fold. White or 

 brownish horn color. 



Diam. 10, alt. 5-5 mill. 



Alabama ; Texas. 



Differs from D. avara in having an umbilical groove. 



21, Dsedalochila avara, Say. 



Plate 11, figures 4, 5, 6. 



Spire depressed, periphery slightly angular ; whorls 5, 

 slightly convex above, with moderate suture, coarsely ribbed, 

 hirsute, convex below, and ribbed only for a short distance be- 

 hind the lip, the balance of the base nearly smooth ; base with- 

 out groove, showing a little more than one whorl, and with a 

 minute perforation ; aperture with reflected lip, the extremities 

 of which are joined by a callus, forming a large V-shaped tooth ; 

 right margin with two teeth, one of them basal and oblique, the 

 other submarginal and lamellar. 



Diam. 7, height 3 mill. 



Florida. 



22. Dawialocliila espiloca, Ravenel. 



Plate 11, figures 7, 8, 9. 



Spire slightly elevated and a little convex, periphery suban- 

 gular, well rounded below ; whorls 5, thin, ribbed-striate above, 

 finely striate below, suture moderate ; the last whorl a little 

 deflected and contracted behind the aperture ; base showing 1| 

 whorls, the umbilical region bounded by an angle ; margin of 

 aperture continuous, the parietal tooth linguiform, the upper lip 

 tooth hook-shaped at its lower termination, the basal tooth ob- 

 lique. Horn color, shortly hirsute. 



Diam. 8, alt. 3-5 mill. 



Sullivan's Island, South Carolina. 



