HELICID^E. 



bene discretis ; apertura constricta, lunata, peristomate albo, 

 reflexo, intus incrassato. 



SYNONYMS AND REFERENCES. 



H. JBerlanderiana, MORICAND, Mem. de Geneve, VI. 537, tab. 1. fig. 1. 

 LAMARCK, An. sans Vert. (Desh. ed.) VIII. 133. 

 PFEIFFER, Monog-. Helic. Viv. I. 165, No. 425. 



DESCRIPTION. 



ANIMAL quite transparent, yellowish white, immacu- 

 late ; tentacles darker, with a dark line running back 

 from them quite under the shell ; eyes black. 



SHELL rather small, depressed globose, thin and trans- 

 lucid, scarcely striated, shining and with a somewhat 

 silken or opaline lustre, pale yellowish green, sometimes 

 nearly colorless, and generally having a faint, narrow, 

 brownish band around the posterior third of the last whorl. 

 Spire consisting of five well rounded whorls, separated by 

 a deeply impressed suture, the last whorl broadly rounded 

 at the periphery ; contracted at the aperture, which is 

 small crescentic, with a white, polished, roundly reflexed 

 peristome, presenting a sharp, inner edge to the interior. 

 The peristome is somewhat angular near its posterior 

 junction, and at this part the shell is thickened within 

 with callus, and is opaque white. Base rounded, and 

 perforated by a minute umbilicus. 



Diameter half an inch ; altitude variable, on an aver- 

 age one-fourth less. 



GEOGRAPHICAL DISTRIBUTION. Inhabits the south- 



