JRemarhs on Certain Species of JVorth Amei'icmi IlELiciDiE. 



By Thomas Bland. 



Bead March 5, 1860. , 



Beprinted from the Annals of the Lyceum of Natural History in New York, Vol. vli., April, 



1S60. 



Helix e§piloca Ravenel. 



Plate IV. fig. 1-2. 

 T. rimato-perforata, superne convexiuscula, subtus convexa, striata, 

 rufescente- cornea, tenui, pilis brevissimis obsita; spira vix elevata ; anfr. 

 5 convexiusculis, ultimo ad aperturain breviter deflexo, disjancto, scro- 

 biculato-constricto ; apertura perobliqua, subreniformi, coarctata ; perist. 

 acuto, continuo, marginibus lamella superne excavata, dentem lingui- 

 formem emittente, junctis; dcxtro lamella lata uncata, basali dente 

 lamelliformi, erecto, intra aperturam producto et recurvato, instructo. 



Shell perforate, above sligiitly convex, beneath convex, 

 striated, reddish-horn colored, thin, with very short hairs ; spire 

 scarcely elevated ; whorls 5, rather convex, the last deflected 

 and turned outwards from the preceding one, scrobiculate, 

 constricted, grooved within the umbilical region; aperture very 

 oblique, subreniform, contracted; peristome acute, continuous, 

 the margins joined by a lamella, excavated above, and pro- 

 duced into a tongue-shaped tooth ; the right margin having a 

 broad hooked lamella, and the base an erect lamelliforrn tooth 

 produced into and recurved within the aperture. 



Diam. maj. 9, min. 8, Alt. 4, mill. 



" " 7 " 6 " 3 " var. minor. 



Habitat. — Sullivan's Island, South Carolina. Dr. E. Eavenel ! 



Observations. — This species is certainly distinct from the 

 otliers of the group. In the form of the parietal process, it is 

 intermediate between H. Postelliana and H. avara., but most 

 like the latter; the teeth on the peristome are very similar to 

 those in the former, but beneath it is less inflated, the umbi- 

 lical region is wider, showing more of the penultimate wliorl, 

 and it is hirsute. 



I am indebted for this species to Dr. Edmund Eavenel, and 



