I 



482 



Binney^s Monograph of the Helices 



4. HELIX CLAUSA. 



Plate XV. 



H. testi Bub-globosfij sub-imperforata, luteo-come& ; anfractibus 

 striatisj striis minutis crebris ; apertura rotundatA ; peristomate albo, 

 margine reflexo. 



4^ 



Synonyms and References. 



M 



i 



Helix clausa. Say. Journ. Acad. Nat. Sc. PhiL Vol. 



II, j;. 154. 

 American Conchology, No. iv, jp7. S'^yfiS* !• 



Description. 



Anim 



Blackish. 



Shell Rounded, somewhat globular: epidermis, yel- 

 lowish-brown or russet color : suture^ distinct : whorls, 

 between five and six, with delicate, raised, oblique striae: 

 aperture^ somewhat rounded, upright, its plane making 

 an acute angle with the axis of the shell, somewhat con- 

 tracted by the lip ; Up, white, reflected : base rounded : 

 umbilicus, nearly covered by the reflected lip. 



Greatest transverse diameter half an inch. 



Geographical distribution, "Occurs,'' according 

 to Mr. Say, "in several parts of the Union, and particu- 

 larly in the Western States," and " but rarely in Penn- 

 sylvania." The specimens which I have seen were 

 brought from Alabama and Arkansas. 



Remarks. This is a doubtful species. The speci- 

 mens which 1 have noticed in Cabinets under this name, 

 have been generally small varieties of H. Pennsyhanica, 

 Green, or of H. thyroidus, Say, in its immature state 

 without the tooth. The former can be detected by its 



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