PLEUROCERA. 109 



band above the middle. All the specimens have apices so much 

 eroded that the number of whorls cannot be correctly ascertained. 

 There may be six or seven. The aperture is probably more than one- 

 third the length of the shell. — Lm. 



Notwithstanding the differences pointed out by Mr. Lea, 

 I suspect that this and cyUndraceum will prove to be one species. 



G. Smooth species, not angulated. 

 53. P. glandulum, Anthony. 



Melania glandula, Anthony, Proc. Acad. Nat. Sci., p. GO, Feb., 18G0. Binney, 



Check List, No. 124. Brot, List, p. 39. Reeve, Monog. Melania, sp. 393. 

 Melania glans, Anthony, Ami. N. Y. Lye., vi, p. 123, t. 3, f. 23, March, 1854. 



Description. — Shell ventricose-conic, smooth, thick, dark-olive ; 

 spire acuminate, but not elevated ; whorls eight, convex, rapidly con- 

 verging to the apex ; body- whorl very large, rounded beneath ; 

 sutures well defined, white ; aperture not large, elliptical, 

 within dai'k-puri^le ; columella indented near the base ; 

 sinus well developed. 



Diameter, -38 inch (10 millim.) ; length, -75 inch (19 

 millim.). Length of aperture, -34 inch (0 millim.); 

 breadth of aperture, -IG inch (4 millim.). 



Habitat. — Tennessee. 



Observations. — A plain sombre-looking species with no very remark- 

 able distinguishing characters except its large, bulbous form, and 

 dark, purple mouth. It cannot be compared with any other species. 

 The whorls are slightly shouldered, with a very narrow, whitish, 

 sutural region. — Anthony. 



The specific name ^^ glans" first used by Mr. Anthony, 

 being preoccupied, he changed it to glandula. It is a curious 

 species, resembling Jayt, Lea, in the channel of the aper- 

 ture, but is much more inflated. 



The figure is from Mr. Anthony's type specimen. 



