HELIX §. 39. 40. 149 



(8S. Kivi Gray Mon. I. p. 192. 





7S9. H. virginea Adams. •[• 



T. imperfofala, conica, prillide bruiinea, anfraclibus su- 

 premis et zona peripherica corneis, epidermide alba, hydro- 

 phana fulguratim strigala; slriae incrementi subliles; spira 

 elevala, apice obtusiuscula; sutura parum impressa; anfr. fere 

 6 convexiusculi, ultimus supra aperluram suborbicularem valde 

 protraclus; perist. tenue, acutum, margine columellari incras- 

 sato, expanso, rubro, arcuatim in dextrum ahienle. — Diverg. 

 80°. — Diam. maj. 0,78, min. 0,67, alt. 0,73". (A.) 



Helix virginea Adams Contrib. to Conchol. N. .3. p. 33. 

 Habitat in insula Jamaica. 



§. 40. 

 790. H. Poiretiana Pfr. 



T. perforata, conica, soHda, strialula, nitida, carneo-al- 

 bida, strigis pallide fusculis irregulariter picla; spira conica, 

 obtusiuscula ; sutura impressa, subtilissime crenulata; anfr. 7 

 vix convexiusculi, ultimus subrotundatus, fascia unica fusca 

 signatus, anlice breviter descendens; apertura diagonalis, lu- 

 nato-rotundata; perist. acutum, margine dextro repando, basali 

 subincrassato, columellari fornicatim reflexo, perforalionem fere 

 tegente. — Diam. maj. 19^^, min. 187^, alt. 23 mill. (Mus. 

 Cuming.) 



Helix Poiretiana Pfr. in Proc Zool. Soc. f8o1. 



— — Cheyirn. ed. II. Helix N. 907. t. 140. f. 5. 6. 

 Habitat ad Portum Essington. 



791. H. nautiloides Valenciennes. ^ 



T. orbiculato-discoidea, depressa, tenuis, pellucida, laevi- 

 gata, corneo-Iutescens; spira brevis, obtusa; anfr. 4 convexi- 

 usculi, rapide crescentes, ultimus magnus, latus, convexus, 

 subtus depressus, umbilico parvo perloratus; apertura magna, 

 vix obliqua, ovato-Iunaris; perist. simplex, acutum, basi rectum, 

 album, dilatalum, incrassalum. — Diam. 21, alt. 12 mill. (Desh. ) 

 Helix nautiloides Valenc. in Mus. Paris. 



— — Desh. m Fer. hist. I. p. 191. N. 256. t. 37A.f. 4 



Habitat . . . ? 



792. velutina Lam. •{• {Chenu t. 6. f. t. t. 12. f. 2. 



Chemn. ed. II. Helix N. 749. t. 122. f. 7—10.). Mon. I. p. 193. 



793. Mexicana Koch. - - - I9;i. 



