290 HELIX §. 55. 



arcuato. — Diam. maj. 8'/«, min. 8, alt. 5 mill. (Coll. Nr, 460 

 Spec. Lowean.) 



Helix calva Lowe Faun. Mader. p. 49. t. ?i. f. 2 6. 

 Habitat in Maderae sylvis. 



* * 



757. H. albolabris Say. 



T. obtecte perforata, depresso-globosa, costulis obliquis 

 striisque spiralibus obsoletis, confertissimis subdecussata, flava; 

 spira parum elata; anfr. 5^2 convexiusculi; apertura rotundato- 

 lunaris; perist. angulatim late reflexum, intus album, nitidum, 

 caliosum, ad columellam brevem, arcuatam dilatatum. — R. a. = 

 3:5. — Diam.maj. 36, min. 26, alt. 17 — 18 mill. (Coli. Nr. 461.). 

 Helix albolabris Say in Nichols. Enc. Conch. t. \. i. \. 



— — Say Amer. Conch. t. 13. f. \. 2. 



— — (Helicogena) Fer. pr. 76. Hist. t. 43. f. 1—3. 



— — Binn. in Bost. journ. L p. 475. t. 13. 



— — Goi^W report p. 170. f. 101. 



— — Pfr. Symb. 11. p. 22. 



— — Chemn. ed. IL Helix N. 53. t. 15. f. 7. 8. 

 Tridopsis albolabris Beck ind. p. 22. 



List. syn. t. 47. f. 45 ! 

 /?. Magis globulosa: Fer. t. 43. f. 4. 5. 

 y. Maxima: diam. 38, alt. 28 mill. (ic. Fer.) 



Helix major Binn. in Bost. journ. I. p. 473. t. 12. 



— . albolabris var. Fer. t. 46 A. f. 7. 



Habitat in America boreali: Missouri, Ohio, Georgia, Alabama, 

 Florida etc. 



Obs. Conf. H. zaleta Say. (Nr. 824.) 



758. H. multilineata Say. 



T. obtecte perforata, depresso-globosa, tenuis, pellucida, 

 costulis minutis, obliquis, confertissimis ornata, corneo-straminea, 

 cingulis variis (25 — 30) angustis rufis circumdata; anfr. 6 con- 

 vexiusculi; apertura lunalo-rotundata; perist. acutum , angulatim 

 reflexum, margine columellari in laminam tenuem, umbilicum 

 prorsus obtegentem, expanso. — Diam. maj. 23, min. 20, alt. 

 14 mill. (Coll. Nr. 462.) 



Helix midtilineata Say in Philad. journ. II. p. 130. 



— — (HeHcogena) Fer. hist. t. 46 A. f. 3. 



— — Binn. in Bost. journ. I. p. 480. t. 14. 



— — Pfr. Symb. L p. 41. 



— — Chemn. ed. IL Helix N. 427. t. 7L f. 17. 18. 

 Eurycratera midtilineata Beck ind. p. 45. 



