SCHIZOSTOMA. 369 



20. S. Babylonicum, Lea. 



Schizosfoma Babylonicum, Lea, Philos. Proc, iv, p. 167, Aug., 1845. Philos. Trans., 



X, p. G8, t. 9, f. 54. 

 Gyrotoma Babylonicum, Lea, BiNNET, Check List, No. 307. Chexu, Manuel de 



Couchyl., i, f. 2.021. Brot, List, p. 27. Lea, Adams, Genera, i, p. 305. 

 Melatoma Babylonicum, Lea, Reeve, Monog., ep. 6. 

 Schisostoma SpiUmanii, Lea, Proc. Acad. Nat. Sci., p. 54, Feb., 1861. Jour. Acad. 



Nat. Sci., V, pt. 3, t. 35, f. 55. Obs., ix, p. 72. 

 Gyrotoma funiculata, Lea, Adams, Genera, i, p. 305. 



Description. — Shell striate, somewhat fusiform, rather thick, chest- 

 nut-color; spire obtusely conical; sutures impressed; whorls flat- 

 tened ; fissure small ; aperture large, elliptical, somewhat flesh-colored 

 within ; columella smooth, angular at the base, thickened above. 



Habitat. — Tuscaloosa, Alabama. 



Diameter, -48 of an inch ; length, 1 inch. 



Observations. — A single specimen only of this species was sub- 

 mitted to me. It dlfl"ers from the other described spe- Fig. 695. 

 cies in being angular at the superior portion of the 

 whorl along the lower margin of the fissure, making 

 quite a shoulder, and giving it the Babylonic appearance. 

 The fissure is wide, but not deep. The apex being 

 much eroded, the number of whorls could not be ascer- 

 tained. The aperture is nearly half the length of the 

 shell. The deposit on the columella in this individual does not cover 

 the perforation. In others this may difl'er. The outer lip is quite 

 patulous. — Lea. 



S. Bahylonicum was described from a single specimen, sev- 

 eral 5'ears ago, when but few species of the genus were known. 

 As the description of JS. SpiUmanii appears to be much more 

 accurate and to apply well to the shell first named, I have 

 adopted it in this connection. There can be but little doubt 

 that the two species described by Mr. Lea are identical. I 

 have before me a splendid suite of this species numbering 

 about thirty individuals from which the figures of the adult 

 and 3'ouug SpiUmanii are drawn. These were obligingly pre- 

 sented to the Smithsonian Institution by Dr. James Lewis of 

 Mohawk, N. Y., who received them from Dr. Showalter. Mr. 

 Reeve's figure G intended to represent this shell is too large 

 and ponderous and must be received with doubt. 



The description and figure of S. SpiUmanii are given below. 



L. F. W. S. IV. 24 



