OF CONCHOLOGY. 



63 



reflected lip connected on the body whorl by a V-shaped tooth, 

 the lip having two small teeth situated far apart, one on the cir- 

 cumference the other on the base. Pale horn color. 



Diam. 9-5, alt. 5 mill. 



De Witt County, Texas ; Corpus Christi, Texas. 



More delicate, not as distinctly ribbed, more elevated than D. 

 Texasiana ; the lip teeth also are smaller and farther apart. 



6. Dsedalochila ventrosula, Pfeiffer. 



Plate 10, figures 39, 35. 



Orbicular, depressed, minutely perforated, thin, shining ; spire 

 slightly raised, suture well impressed ; whorls 5, but little con- 

 vex, finely striate above, smooth and very convex beneath, the 

 periphery subangulate, much constricted behind the aperture ; 

 aperture rounded lunate, the terminations of the lip joined by a 

 V-shaped parietal tooth ; basal portion of lip with two white 

 denticles, and circumference with a large lamellar tooth. Horn 

 color. 



Diam. 8, height 4*5 mill. 



Texas and Mexico. 



Sometimes attains to one-half larger size. 



7. Dsedalochila Hindsi, Pfeiffer. 



Plate "10, figures 44, 24. 



Shell depressed, orbicular, narrowly umbilicate, finely striate, 

 diaphanous, shining ; spire somewhat conical ; whorls 5, but 

 slightly convex, more convex below, deflected at the aperture and 

 constricted behind it ; aperture lunate, the lip slightly reflected, 

 and its extremities united on the body whorl by a callus and a 

 V-shaped tooth ; on the lip are two small basal teeth and a large 

 lamellar tooth opposite to the parietal one. Color light cor- 

 neous. 



Diam. 8, alt. 4.5 mill. 



Texas and Mexico. 



