IIELIX §. 19. 95 



234. H. arborea Say. 



T. umbilicata, depressa, nitidula, striatula, virenti- velful- 

 vescenti-cornea ; spira convexa , parum elata; anfr. 4 — V]i con- 

 vexiusculi, ultimus vix depressus; umbilicus angustus, pervius: 

 apertura lunato-circularis ; perist. simplex, acutum. — Diam. mnj. 

 5, min. 4/3, alt. 2^4 mill. (Coll. Nr. 125.) 

 Eelix arborea Say Araer. Enc. t. 4. f. 4. 



— — (Helicella) FeV. pr. 219. 



— — Binn. in Bost. journ. III. p. 422. t. 2 2. F. 1. 



— — Gould report p. 1 82. f. H 0. 



— — Pfr. Symb. II. p. 23. 



— — Chemn. ed. II. Helix N. 533. f. 8 3. f. 33 — 35. 



— nitidula /? Fer. ? 



i, — Ottonis Pfr. in Wiegm. Ai-ch. 1840. I. p. 251. 

 Habitat in America boreali : Ohio, Massachusetts; nec non in 

 insula Cuba! 



Obs. Comparata speciminum copia H. Ouonls ab arborea specifice sepa- 

 randam non esse cognovi. 



235. H. nitensoides Orbigny. "'■f 



\ T. orbiculato-depressa , umbilicata, lenuis, pellucida, succinea, 

 lucida ; spira convexiuscula ; anfr. 5 minime distincti ; apertura 

 semilunaris. — Djam. ^, alt. 5 mill. (0.) - 



Helix nitensoides Orb. cub. I. p. 161. t. 10. f. 9 — 12. 

 Habitat in insula Cuba. 



Obs. An varielas praecedentis? 



236. H. vortex Pfr. 



T. anguste umbilicata , convexo -discoidea , hyalina ; anfi\ 5 '4 

 convexiusculi , angusti, obsolete striati, ultimus subangulatus, 

 plerumque deorsum deviatus; apertura lata, lunaris; perist. sim- 

 plex, acutum, margine columellari reflexiusculo. — Diam. maj. 6, 

 min. 5 '/2 , alt. r/i — 3 '/^ mill. ( Coll. Nr. 126.) 



Helix vortex Pfr. in Wiegm. Arch. 1839. I. p. 351. 



— — Chemn. ed. II. HeUx N. 526. t. 85. f. 7 — 9. 

 Habitat in provincia Canimarensi insulae Cubae! In insuia St. 

 Croix Indiae occidentaHs (Mus. Cuming.). 



237. H. peraffinis Adams. 



T. umbilicata, depressa, striatula, hyalina; spfra brevissima, 

 obtusa; anfr. 6 convexi, ultimus rotundatus, basi planiusculus ; 

 umbilicus raediocris; apertura subverticalis , triangulato-lunaris; 

 perist. simplex, acutum, margine dextro subvertieali, columellari 



