64 HELIX §. II. 



mus subdepiessus, noii descendens, basi subplanatus; apertura 

 fere verticaiis, depressa, lunaris; perist. simplex, rectum, ad 

 perforationem vix reflexiusculum. — Diam. maj. 8, min. 7, alt. 

 4 mill. (Coll. Nr. 92.) 



Helix Perrotteti Pfr. in Zeitschr. f. Malak. 1851. p. 13. 



— — Chemn. ed. II. Helix N. 1088. t. 159, f 41 —44. 

 llabitat in mdntibus Nilagiricis (Perrottet). 



212. H. nitella Morelet. f 



T. subperforata , convexo-depressa, pellucida, levis, corneo- 

 fulva, unicolor; anfr. 57^ convexiusculi, ultimus corapressus, 

 circa perforationem paululum excavatus; sutura anguste mar- 

 ginata; apertura obliqua, lunato-ovalis; perist. simplex , acutum. 

 — Diam. 7, alt. 2^2 mill. (M.) 



Helix nitella Morelet in Guer. Rev. et Mag. Zool. 1851. p. 219. 

 Habitat in insula Mauritii. 



Obs. uH. nltldae affinis; umbilico lineari praecipue differt. » An 

 eadem ac praecedens? 



213. H. plnguis Krauss. 



T. perforata, orbiculato-convexiuscula, tenuis, pellucida, 

 Jaevigata , nitida, superne fuscidulo-cornea, basi pallidior; spira 

 parum elevata , vertice acutiusculo; anfr. Sy^ convexi, sensim 

 accrescentes , ultimus basi subplanulatus, medio impressus, an- 

 guste perforatus; apertura vix obliqua, lunaris; perist. simplex, 

 acutum, margine columellari brevissimo, reflexiusculo. — Diam. 

 maj. 8, min. 7, alt. 4 mill. (Coll. Krauss. ) 



Helix pinguis Kraiiss siidafr. Moll. p. 75. t. 4. f 19. 



— — Pfr. in Zeitschr. f. Mal. 1848. p. 91. 



— — Reeve Conch. ic. N. 2 00. t. 43. 

 Uabitat ad Natal Africae meridionalis (Wahlberg). 



214. H. albicans Pfr. 



T. perforala, depressa, striatula, sublaevigata, nitida. 

 hyalino-albida; spira vix elevata; sutura impressa, marginata; 

 anfr. 5 planiusculi, lente accrescentes, ultimus non descendens, 

 subrotundatus, circa perforationem impressus; apertura verti- 

 cahs, late lunaris; perist. simplex, acutum, margine columel- 

 lari brevissime reflexo. — Diam. maj. 8, min. 7, alt. 4 mill. 

 (Mus. Cuming.) 



Helix albicans Pfr. in Proc. Zool. Soc. 1849. p. 127. 



— — Chemn. ed. II. Helix N. 777. t. 125. f 16—18. 



Habitat in insula Jamaica. 



Obs. Superne faciem offert //. vorticis. 



