118 Remarks on Certain Species of II. A. Helicidos. 



Diam. maj. 11, min. 9, Alt. 6, mill. spec, from Salem, N. Car. 

 Hartvig ! 



Habitat — Gaston Co., N. Car., Wheatley. Salem, K. Car., 

 Hartvig ! 



Remarks. — This shell is closely allied to the Texan species, 

 H. vultuosa Gould, and also to S. fallax Say. It differs from 

 the latter in the narrower umbilicus, which only shows the 

 penultimate whorl ; in the groove in the last whorl within the 

 umbilical opening, the character of the basal tooth, and the 

 internal tubercle (a modification of the fulcrum of Lea), which 

 does not prevail m fallax and its immediate allies tridentata and 

 Hopetonensis. In H. introf evens the upper tooth is less deeply 

 seated and less inflected, and the basal one is broader, and more 

 elevated than in vultuosa, the parietal tooth is more arcuate, 

 being indeed subangular, but is without the indication, notice- 

 able in Gould's species, of a callus extending from its lower 

 termination towards the upper angle of the lip. H. vultuosa 

 is even smaller than the var. minor of my species. 



Several years ago I received four or five specimens from Dr. 

 Budd, and noticed the tubercle within the aperture, subse- 

 quently Mr. Wheatley gave me the only one in his cabinet, and 

 the Rev. Mr. Hartvig sent me several collected by himself at 

 Salem, 1^. C., where he then resided. 



Helix Chri§tyi, iiov. sp. 



Plate IV. fig. 5-6. 



T. iraperforata, depressa, solidula, confertim costulato-striata, fusco- 

 cornea ; spira brevi, obtusa ; anfr. 4|- convexiusculis, ultimo ad aper- 

 turam deflexo, constricto, superne gibbo, ad peripheriam subangulato ; 

 basi convexo, in medio excavato ; apertura depressa, dente lamelliformi 

 valido, obliquo, in pariete aperturah intrante coarctata ; perist. reflexo, 

 intus albo-calloso. 



