HELIX. 103 



Helix minutalis Morelet nee. Fer. Test. Nov. ii. p. 7. 

 Helix apex Adams, Contr. Conch, p. 36. 



Reeve, 1. c. 339. 

 Helix Lavelleana Orb. Moll. Cub. in textu, p. 161, excl. tab. (1853). 

 Helix MauHniana Orb. 1. e. in tab. viii. figs. 20-22, excl. textu. 



Has been detected also in Michigan, Georgia, New 

 York, and in Washington Co. Texas (Moore). Is also 

 found in Cuba, Porto Rico, and Jamaica. 



In Mai. Blatt. ii. 93, Pfeiffer states that H. Lavelleana 

 is represented in the British Museum by poor specimens 

 of minuscula. I follow the same author in placing minu- 

 talis and apex in the synonymy. 



They are thus described. 



Helix apex. Shell discoidal ; whitish ; with microscopic spiral striae ; 

 spire scarcely elevated, convex ; apex very obtuse ; whorls 4, cylindri- 

 cal, with a deep suture ; aperture nearly circular ; lip thin and sharp ; 

 umbilicus very wide. 



Helix minutalis. T. perspective umbilicata, subdiscoidea, minute stria- 

 tula, corneo-albicans ; anfr. 4 convexiusculi, sutura impressa distincti; 

 apertura vix obliqua, subcircularis ; peristoma simplex, marginibus ap- 

 proximatis. 



Hab. circa pagum I'alizada provinciffi Yucatenensis, necnon in insula 

 Cubana. 



HEIilX ASTERISCUS Morse. 

 Plate LXXVII. Figure 9. 



synonyms and references. 

 Helix asteriscus Morse, Proc. Bost. Soc. Nat. Hist., vi. p. 128, March, 1857. 



Animal short, bluish. 



Shell small, orbicular, very much depressed ; whorls four, 

 rounded above and below ; banded by twenty-five to thirty very 

 thin, transparent, and prominent ribs, very oblique, inclined back- 

 ward ; spire not rising above the last whorl ; suture deeply im- 

 pressed ; umbilicus moderately large, showing all the volutions ; 

 finely striated between the ribs ; in some specimens parallel lines 

 may be observed. Color light brown. 



Dimensions : breadth, -^\ in. ; height, ^^g- in. 



