62 PROCEEDINGS OP THE ACADEMY OF 



obscure, scarcely perceptible, and those within the aperture are arrested before 

 reaching the edge of the lip. The ribs which are inconspicuous on the spire 

 become more decided on the body whorl, and sometimes appear as varices 

 there ; the spire is very obtusely elevated. 



M. iostoma, Anthony. Shell ovate-conic, smooth ; spire obtusely elevated ; 

 whoils about six, subconvex ; body whorl exhibiting uncommonly strong lines 

 of growth, curved and varicose ; color greenish olive, shining ; sutures dis- 

 tinct ; body whorl strongly but not sharply angulated on the middle ; aperture 

 broad-ovate, within light purple, which becomes very deep on the columella, 

 which is regularly rounded : outer lip somewhat produced, and having a well 

 developed sinus at base. 



Hab. Tennessee. 



My Cabinet; Cab. Hugh Cuming, London; A. N. S., Philada. ; Smithsonian 

 Collection. 



Obs. This species approaches nearest in form and color to M. fflans, nob., 

 now changed to glandula, from which it diiFers in being less globular, of a 

 lighter color generally, and by the angulated body whorl. Compared with M. 

 pinguis, Lea, it is less obese, more elongate, and has not the rapidly attenuat- 

 ing spire of that species. From all others it is readily distinguished. 



M. intkrtexta, Anthony. Shell conical, acute, and highly elevated ; whorls 

 about ten, each strongly ribbed longitudinally and furnished also with revolv- 

 ing stria;, which becoming more elevated near the suture, arrest the ribs at that, 

 point ; sutures decidedly impressed ; aperture pyriform, not large, whitish 

 within ; columella slightly rounded, not indented ; sinus distinct, but small. 



Hab. Tennessee. 



My Cab.; Cab. H. Cuming; A. N. S., Philada.; State Coll., Alb., N. Y. ; 

 Smithsonian Collection. 



Obs. A very abundant species. About two hundred specimens are now be- 

 fore me, and present characters remarkably uniform. May be compared with 

 M. bella, Conrad, but differs by its more elongate and sharply elevated form ; its 

 ribs are more decided, and it has not the bead-like prominences, so common in 

 M. bella, and kindred species. From M. arachnoidea, nob., it may be distin- 

 guished by its less elongate but more acute form, difference of aperture and 

 less number of whorls; the striae revolve around the whorls and over the folds 

 without being arrested by them, giving the surface a woven appearance : hence 

 its name. 



M. rigida, Anthony. Shell conic, elevate, carinate, rather thin ; whorls 8 9, 

 carinate and banded ; sutures distinctly marked ; aperture small, elliptical, 

 whitish within ; columella indented ; sinus small but very distinct. 



Hab. Tennessee. 



My Cabinet ; Cab. H. Cuming ; A. N. S., Philada. ; State Coll., Alb., N. Y. ; 

 Smithsonian Collection, Washington, D. C. 



Obs. This is one of those sharply keeled Melanice of which 31. bella, Con., M. 

 carino-costata and 31. oblita, Lea, may be considered good examples. The 

 whorls of the spire have each two carinas, with generally a dark band between 

 them, though this is sometimes wanting ; the body whorl has four or five of 

 these, carinre and generally two bands, one of which revolves within the aper- 

 ture. To the touch this species has a peculiarly rough feel. 



M. gracillima, Anthony. Shell conic, thin, brownish ; spire very slender, 

 elevated, composed of eight convex whorls, the upper ones folded and striate, 

 the lower ones smooth, the striae being replaced by indistinct, slender, brown 

 lines ; sutures very deeply impressed, a sharp carina on the lower portion of 

 each whorl, rendering them quite distinct ; aperture small, ovate, banded in- 

 side ; columella indented ; sinus small. 



Hab. South Carolina. 



My Cabinet. 



[Feb. 



