HRLIX §. 19. 95 



234. H. arborea Say. 



T. umbilicata, depressa, nitidula, striatula, virenli- vel ful- 

 vescenli-cornea ; spira convexa, parum elata; anfr. 4 — Vji con- 

 vexiuscuii, ullimus vix depressus; umbilicus angustus, pervius; 

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

 5 , min. 4 /s , alt. Sy^ mill. ( Coll. Nr. \ 25. ) 

 Helix arborea Satj Amer. Enc. t. 4. f. 4. 



— — (Helicella) Fer. pr. 2t9. 



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



— — Gould report p. 182. f. H 0. 



— — Pfr. Symb. II. p. 23. 



— — C/imn. ed. II. Helix N. 533. t. 8.",. f. .33 — .35. 



— nitidula /? Fer. ? 



— Ottonis Pfr. in Wiegm. Arch. 1840. I. p. 2o]. 



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

 iiisula Cuba! 



Obs. Comparala speciminum copia II. Otlonis ab arborea specifice sepa- 

 randam non esse cognovi. 



235. H. nitensoides Orbigny. "f 



T. orbiculato-depressa , umbilicata, tenuis, pellacida, succinea, 

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

 semilunaris. — Diam. 9, alt. 5 mill. (0.) 



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

 Habitat in insula Cuba. 



Obs. An varietas praecedentis? 



236. H. vortex Pfr. 



T. anguste umbilicata, convexo-discoidea, hyalina; anfr. 5 '/2 

 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/. — S'/^ mill. (Coll. Nr. 126.) 



Helix vortex Pfr. in Wiegm. Arch. 1839. I. p. 331. 



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



Habitat in provincia Canimarensi insulae Cubae! In insula St, 

 Croix Indiae occidentalis (Mus. Cuming.). 



237. H. peraffinis Adams. 



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

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

 umbilicus mediocris; apertura subverticalis, triangulato-lunaris; 

 perist. simplex, acutum, margine dexlro subverticali, columellari 



