NATURAL SCIENCES OP PHILADELPHIA. 61 



ovate, not large, exhibiting the bands inside; columella deeply rounded, in- 

 dented and callous; sinus none. 



Hab. Tennessee. My Cab. ; Cab. H. Cuming; A. N. S., Philada. 



Obs. A short, pretty species, with no very marked characters, though easily 

 recognised as distinct on examination ; in form and coloring somewhat like 

 M. co?npac(a, nobis, but far less solid and heavy than that species ; the spire is 

 more elevated and acute and the surface smoother. It most nearly resembles, 

 perhap3, M. coronilla, nobis, but is less elevated and has not the peculiar 

 crowning ribs of that species, which is sufficient at once to distinguish it. It is 

 also more robust. 



M. corneola, Anthony. Shell small, conical, rather thin ; spire short and not 

 very acute, composed of five or six subconvex whorls ; whorls all more or less 

 folded and with revolving raised striae which give them a subnodulous appear- 

 ance ; the body whorl has four or five faint bands which appear also within 

 the aperture ; aperture small, ovate, sinus small. 



Hab. Alabama. My Cabinet. 



Obs. This is a small and not very remarkable species, nor can it well be 

 compared with any other. One is at first view forcibly reminded of Columbella 

 avara, Say, which it resembles both in size and general appearance. The 

 bands alluded to are often interrupted and never very fully expressed ; body 

 whorl subangulated below the middle ; does not seem to be a very abundant 

 species. Only six individuals are before me. 



M. grata, Anthony. Shell conic, elevated, smooth, thick; whorls 9, flat, 

 terminating in an acute apex, the first three or four whorls being carinated ; 

 color light greenish-yellow, ornamented by a single dark band on the spiral 

 whorls, and four similar bands on the body whorl, giving the shell a truly 

 lively and beautiful appearance ; sutures very distinct ; aperture ovate, banded 

 within ; columella deeply indented and curved at base, where there is a small 

 but rather broad sinus. 



Hab. Alabama. My Cabinet. 



Obs. The colors in this species are finely contrasted, and the general ap- 

 pearance is very lively and pleasing: the bands on the body whorl are not 

 uniformly distributed, the upper and lower ones being widely separated, while 

 the central ones are very close together and less distinct. Altogether it is one 

 of our most beautiful species. 



M. germana, Anthony. Shell carinate on the body whorl ; form rhombic ; 

 substance rather thin ; varying in color from ash grey to dark brown ; whorls 

 six, upper ones smooth ; suture very distinct ; aperture rhombic, within 

 brownish, with a white area near the outer edge ; columella rounded or angu- 

 larly indented, slightly callous ; sinus small. 



Hab. Cahawba River, Alabama. My Cabinet. 



Obs. This is another of the short, rhombic species, which are represented 

 most fitly by M. rhombica, nob., and includes M. angulata, nob., M. cubicoides, 

 nob., M. crislata, nob., and many others. From M. rhombica, it differs in being 

 shorter and less slender, and by wanting the regular concentric striae so con- 

 spicuous on the upper half of that species ; it is also less slender than M. angu- 

 lata, nob., and more solid. From all other species it may readily be distin- 

 guished. 



M. grisea, Anthony. Shell ovate, smooth, thick, of a dull grey color ; 

 whorls 7, convex; sutures very distinct; body whorl obscurely ribbed, and 

 having two or three inconspicuous bands revolving around it ; aperture large, 

 ovate, banded within ; columella deeply indented, with a white callus, unusu- 

 ally thickened at the summit of aperture ; sinus broad but not distinct. 



Hab. Tennessee River, North Alabama. My Cabinet. 



Obs. A single specimen only of this species has come under my notice, but 

 I cannot consider it referable to any described species. The bands are very 



I860.] 



