NATURAL SCIENCES OF PHILADELPHIA. 69 



lar, within whitish ; columella only slightly rounded, somewhat flattened by 

 a callous deposit, more or less tinged with dirty red. 



Hab. Tennessee. My Cab. ; Cab .Hugh Cuming, London ; A. N. S., Phila- 

 delphia ; State collection, Albany, N. Y. ; Smithsonian collection. 



Obs, Resembles none other of the genus ; its color, which is of a dull dark 

 brown, and its semicircular mouth, remarkable for its length and bre idth, are 

 prominent marks of distinction ; the body whorl is very much inflated and 

 angulated or subangulated ; the interior aperture is often blotched with ir- 

 regular, dirty brown spots ; spire elevated and acute, rapidly diminishing to 

 the apex ; the lines of growth are strong, and on some specimens a single 

 prominent varix may be noticed. % 



Anculosa elegans, Anthony. Shell subglobose, smooth, thick ; spire de- 

 pressed, consisting of 3 4 flat whorls ; color fine glossy dark yellow, orna- 

 mented with darker bands, of which five are on the body whorl ; aperture 

 obliquely ovate and banded within ; columella deeply curved, with a heavy 

 callous deposit ; sinus very small. 



Hab. Alabama. My Cabinet. 



Obs. A highly ornamental species, which cannot be compared with any 

 other ; its bands on a yellow ground render it very lively ; it is heavier and 

 smoother than A. ampla, nobis, not so broad in the aperture and far more 

 beautiful ; neither is it so much shouldered as that species. 



Anculosa zebra, Anthony. Shell subglobose, smooth, moderately thick ; 

 spire obtusely elevated, but slightly decorticated, and composed of four convex 

 whorls ; sutures distinctly impressed ; aperture broad, ovate, within bluish, 

 with the epidermal colors seen faintly through ; columella rounded, covered 

 with callus, which is thickened at the upper part. 



Hab. Alabama. My Cabinet. 



Obs. This species presents an appearance not often seen in the genus, by 

 its mottled, variegated epidermis ; the general ground color is gamboge yel- 

 low, but it is varied by blotches of very dark brown or reddish, often running 

 into diagonal lines, which gives the shell a very lively and pleasant look. 

 Only one other species is described as being similarly marked, viz., A.flam- 

 raata, Lea ; that species I have never seen, but the description does not war- 

 rant me in considering the two identical. 



In old specimens the spire is often produced and somewhat nodulous, while 

 the longitudinal bands become broken into irregular lines, so interrupted as 

 to become scarcely more than quadrangular spots ; it is one of our most beau- 

 tiful species. About a dozen specimens are before me. 



Io turrita, Anthony. -Shell conic, elevated, horn colored, spinous ; spines 

 rather short and heavy, about seven on each whorl ; whorls nine ; aperture 

 pyriform, about one-third the length of the shell, and irregularly banded 

 within ; columella rounded, slightly twisted and forming a short, narrow 

 canal at base. 



Length of shell 2% in. Breadth of shell | in. Length of aperture in. 

 Breadth of aperture 7-16 inch. 



Hab. Tennessee. 



Obs. This is the most slender and elongate species of this genus which has 

 come under my notice, and although a single specimen only has as yet been 

 discovered, its claims to rank as a species will hardly be questioned ; its long, 

 slender form, stout, closely set spines, and small aperture will at once dis- 

 tinguish it from its congeners ; two faint bands traverse each whorl, one of 

 which lies precisely in the plane of the spines ; lines of growth very distinct, 

 nearly varicose. 



Io brevis, Anthony. Shell conic, ovate, horn colored, spinous ; spines 

 short, thick, five on each whorl ; whorls about seven ; aperture elliptical or 

 pyriform, one-half the length of the shell ; collumella rounded and sinuous 



I860.] 



