110 Desertions of New Fluviatile Shells. 



Length 0.56 inch (14 millim.). Diam. 0.85 inch (9 millim.). 

 Length of aperture 0.28 inch (7 millim.). 

 Breadth of do. 0.18 inch (U millim.). 



Habitat. — Alabama. 

 My cabinet. 



Obs. — The only specimen I have is somewhat mutilated, but 

 seems nevertheless perfectly distinct ; the only known species 

 Avith which I can compare it is 3L sulcosa Lea, which is a much 

 thinner and more elevated species. The aperture of the pre- 

 sent shell is also proportionally much larger, and the number 

 of whorls less, for, though injured in that part, the rapid dimi- 

 nution of the whorls does not indicate an elevated spire ; the 

 number of raised lines on the body whorl is also less, and 

 they are rather very elevated costce than striae as in Mr. Lea's 

 species. 



30. 3TIelania torulosa. 



Plate IH. Fig. 10. 



i 



T. cornea, subcrass&, castanea; spira parum elevata, acuta ; anfr. 7-8, 

 supra suturam valde carinatis; suturis linearibus; apertura late ovata, 

 intus purpurascente ; columella incurva, in sinum tenuem desinente. 



Shell conic, chestnut colored, rather thick ; spire little ele- 

 vated, acute; whorls 7-8, strongly carinatcd a little above the 

 suture; sutures linear; aperture not large, broad-ovate, pur- 

 plish, within ; columella regularly but not remarkably curved, 

 with a small sinus. 



Length 0.58 inch (15 millim.). Diam. 0.28 inch (7 millim.). 



Length of aperture 0.23 inch (6 millim.). 



Breadth of do. 0.15 inch (4 millim.). 



Habitat. — Ten nessee. 

 My cabinet. 



