110 RemarTcs on Certain Species 



six whorls, Diam. maj. 20, min. 18, Alt. 9^ mill. Some south- 

 ern forms are beautifully sculptured with numerous spiral lines, 

 and have a narrow but very projecting parietal tooth. Near 

 Nashville, Tenn,, a small flattened var. is found, widely ribbed 

 above, the ribs obsolete at the base, the lip widely reflected, 

 and the parietal tooth arcuate. 



Say's " var. a, Labrum with two projecting angles," inhabits 

 Illinois ; in some speicimens the aperture and teeth are singu- 

 larly hke those oi H. palUata. 



From Wilmington, N. Car., and City Point, Va., I have a 

 remarkable variety, — depressed, with 4^ whorls, the ribs far 

 apart, and the surface between them somewhat granulated ; the 

 periphery more sharply angulated than in other forms, and the 

 parietal tooth more arcuate. Diam. maj, 14, min. 11, Alt. 5^ 

 mill. 



Specimens from Illinois have the whorls flattened above, 

 and jDartially exserted, showing a tendency to variation in the 

 same direction as II. jpalliata. 



Helix palliata Say, 



This shell has been fully identified, but donbts exist as to 

 Say's var. «., H. obstricta Say, H. helicoides Lea, and H. Caro- 

 linensis Lea. Having had much correspondence with concho- 

 logists, both here and in Europe, respecting those forms, I pro- 

 pose fully to (examine the questions which have arisen con- 

 cerning them. 



In 1821 Say daus described H. palliata and H. obst/ricta, 

 {Jour. Acad. Nat. /Sci., Phila. IL, pp. 152-164), — 



H. PALLIATA. — Shell depressed, with elevated lines, forming grooves 

 betv?een them ; epidermis fuscous, rugose with very numerous minute 

 tuberculous acute prominences ; volutions five, depressed above, beneath 

 rounded, forming an obtuse angle exteriorly, which is more acute near 

 the termination of the labrum ; umbilicus covered with a white callus ; 

 aperture contracted by the labrum ; labrum widely reflected, with two 



