IIELIX 55. 30. 165 



423. H. instabilis Ziegler. 



T. lale umbilicata , depressa, striato-rugosa, solida, albida; 



anff. 5 convexi, lente accrescenles, ultimus teres, vix descendens; 



apertura fere circuiaris; perist. simplex, acutum, marginibus fere 



contiguis. — Diam. maj. 14, min. 12, alt. 8^2 mill. (Coil. Nr. 239.) 



llelix instabilis Zgl. Mus. Pfr\ Symb. II. p. 31. 



— — Chemn. ed. II. Helix N. 2 42. t. 38. f. 4 — «. 



— ericetonmi var. Rosstn. VIII. f. 518. 



— Leopolita7ia Andrz. iBock.) 

 Theba instabilis Beck ind. p. 13. 



/j. Minor, fusco-radiata et obsoiete fasciata ; diani. niaj. 10 '/2, niin. 9''i, 

 alt. 5 mill. (Spec.) 



Ilelix instabilis var. Chemn. I. c. t. 38. f. 7 — 9. 

 Habitat in Gallicia. 



424. H. candaharica PfV. 



T. umbilicata, orbiculato-convexiuscula, oblique slriutula, 

 nilidula, fuscescenti-albida, fasciis angustis, maculose iliterruptis, 

 nigricantibus et rufis ornata; spira vix elevata , apicc nitida, cor- 

 nea; anfr. 5 convexiusculi, ultimus antice non descendens; umbi- 

 licus infundibuliformis, anfractum penultimum late nionstrans, 

 medio anguslissimus; ape;"tura obliqua, lunato-ovalis; perist. acu- 

 tum, intus subremote labiatum , marginibus conniventibus, colu- 

 mellari vix dilatato. — Diam. maj. 16, min. 13, alt. 1% mill. 

 (Mus. Cuming. ) 



Helix candaharica Pfr. in Pioc. Zool. Soc. 1846. p. 37. 

 Habitat ad Candahar Indiae orientalis (Benson). 



425. H. Bcrlanderiana Moricand. 



T. umbilicata, depressa, striata, lucida, alba vel cinerea, 

 interdum unifasciata; anfr. 4'/2 convexiusculi, ultimus basi infla- 

 tus; apertura lunato-subcircularis; perist. acutum, intus labiatum, 

 margine columellari juxta umbilicum angustum vix reflexo. — 

 Diam. maj. 8'/2, min. 7^2, ait. 5-/3 mill. (Coll. Nr. 240.) 

 Helix Berlanderiana Mor. Mem. Gen. VI. p. 537. t. 1 . f. 1. 



— — Lam. cd. Dh. 222. p. 133. 



— — Chemn. ed. II. Ilelix N. 243. t. 38. f 18. 19. 



— virginalis Jan in schcd. 

 Habitat in Texas. 



426. H. nivea Ziegler. 



T. perforala, depresso-conica, solidula, nitidula, nivca; anfr. 

 o vix convexiusculi, ultimus muito latior, descendens; umbilicus 

 anguslissimus, non pervius; aperlura magna, oblique lunalo- 



