SCHIZOSTOMA. 363 



of an inch. Length of aperture, seven-sixteenths ; breadth of aper- 

 ture, four-sixteenths of an inch. 



Observations. — A fine, S3'inmetrical species remarkable for its reg- 

 ularly oval form and unusually deep, linear fissure ; the whorls are 

 somewhat shonldcred, though not so much so as in ni: ny rig. 686, 

 of the species ; the spiral whorls are furnished with two 

 broad bands, one near the top of each and the other 

 widely separate and near the preceding whorl, being^ often 

 half concealed by it ; there are three bands on the body- 

 whorl equidistant from each other ; compared with G. bul- 

 bosn (nobis), which it most nearly resembles, it is longer, more 

 linear, and has not the rapidly attenuating spire of that species nor 

 its roughly striate surface. — Anthony. 



12. S. curtum, Mighels. 



Schizostoma curta, Mighels. Bost. Proc, i, p. 189, Oct., 1844. 



Gyrotoma curta, Mighels, Binney, Check List, No. 314. Gould, Bkot, List, p. 27. 

 Adams, Genera, i, p. 305. 



Description. — Shell short, subglobose, smooth, thick and solid ; 

 epidermis dark green, with two or three revolving bauds of a darker 

 color; spire short, obtuse, eroded; whorls three or four, flattened 

 in the middle ; suture superficial ; aperture pear-shaped ; fissure dis- 

 tinct. 



Habitat. — Warrior River, Alabama. — Mighels. 



This species is unknown to me except through the descrip- 

 tion. The locality probably should read Coosa River, in- 

 stead of Warrior River. 



13. S. glans, Lea. 



Schizostoma glans, Lea, Proc. Acad. Nat. Sci., p. 18(5, May, 18C0, Jour. Acad. Nat. 



Sc'i., V, pt. 3, t. ;5.j, f. 52, Marcli, ISO.J . Obs., ix, p. 70. 

 Gyrotoma glans, Lea, Binxey, Check List, No. 3-20. Brot, List, p. 27. 



Description. — Shell smooth, ovately conical, inflated, rather thick, 

 yellowish horn-color or chestnut-brown, striate, imperforate ; spire 

 obtusely elevated; sutures regularly impressed; whorls si.\, obso- 

 letely banded, the last rather large; lip-cut straight, narrow and 

 deep ; aperture rather small, elliptical, white within, obtusely an- 

 gular at the base ; columella white, thickened above ; outer lip sharp 

 and somewhat sinuous. 



