72 HELIX §. 13. 



naris, subtransversa ; perist. simplex, obtusum, basi dilatatum. 

 -- Diam. 26, alt. 15 mill. (Dh.) 



Helix semipartita Desh. in Fer. hist. I. p. 187. N. 241. t. 89. f. 5. 

 Habitat . . .? 



266 H. vitellina Pfr. 



T. angustissime umbilicata, depresso-globosa, superne 

 minutissime decussata, vix nitida, fuscescenti-vitellina; spira 

 breviter conoidea, obtusiuscula; anfr. 5^^ convexiusculi, ul- 

 timus antice subdescendens, infra peripheriam (interdum ob- 

 solete angulatam) vix striatus, juxta umbilicum contractum 

 albus; apertura obiiqua , lunato-rotundata; perist. simplex, 

 marginibus remotis, columellari albo, incrassato-reflexo, su- 

 perne subdilatato. — Diam. maj. 29, min. 24, alt. 18 mill. 

 (Mus. Cuming.) 



Helix vitellina Pfr. in Proc. Zool. Soc. 1848. p. 109. 



— — Pfr. In Zeitschr. f. Malak. 1848. p. 92. 



— — Chemn. ed. 11. Helix N. 763. t. 122. f. 22. 23. 

 Habitat . . . ? 



Obs. Similis H. tranquebaricae Nr. 94. 



267. lig^lata Fer. (Coll. 122. — Chemn. ed. nov. I. 



p. 206. — Desh. in F6r. hist. I. p. 180. N. 240. 



— Nanina [Xesta] ligul. Alb. p. 59.) Mon. I. p. 71. 



268. rufa Less. (Coli. 123. — Reeve N. 193. t. 42. — 



Chemn. ed. nov. II. p. 119. — Nanina [Hemi- 



plecta] rufa Alb. p. 60.) - - - 73. 



269. H. bisculpta Benson. 



T. perforata, orbiculato-depressa, translucens, parum ni- 

 tida, subtus cornea, supra rufescens, utrinque eleganter con- 

 fertissime striato-plicata, phcarum verticalium interstitiis longi- 

 tudinaliter striatissimis, striisque spiralibus decussatis; spira 

 depresso-convexa, apice laevi, obtuso; sutura profunda; anfr. 

 4Y2 convexi, lente accrescentes, ultimus non descendens, ro- 

 tundatus, subtus convexior; apertura verticalis, lunaris; perist. 

 simplex, acutum, margine columellari arcuato-declivi , crassius- 

 culo, supra breviter late reflexo, laminam triangularem for- 

 mante. — Diam. maj. 7, min. 6V2, alt. 47^ mill. (Mus. 

 Benson.) 



Helix bisculpta Bens. in Ann. and Mag. 2 d. ser. VII. 1851- 

 p. 103. 

 — — Chemn. ed. II. Helix N. 920. l. 141. f. 17-19. 



Habitat sub lapidibus ad «Camp's Bayw Promontorii Bonae 

 Spei. 



