50 HELIX §. 20. 



2S4. H. perfucata Benson. •{- 



tt T. vix perforata, depressa, translucente, purpureo-fusca, 

 politissima; spira olevatiuscula, sulura submarginala, apice ob- 

 tuso; anfr. 4 convexiusculis, arcte convolutis, ullimo rotundato, 

 subtus convexo ; apertura lunala , vix obliqua ; perist. recto, 

 acuto, niargine columeliari verticali, leniter reflexo; umbilico 

 non pervio. — Diam. maj. 5, min. 4, axis 3 mill. » (B.) 



Ilelix perfucata Bens. in Ann. and Mag. N. H. 2d. ser. XH. p. 93. 

 Nanina perfucata (Xesta) Pfr. Vers. p. 120. 



Uabitat in pago Gallensi insulae Ceylon (Layard). 



285. pinguis Krauss. {Rv. n. 200. t. 43. — Nanina 



pinguis [Xesta] Pfr. Vers. p. 120.) Mon. III. p. 64. 



280. albicans Pfr. [Rv. n. 335. t. 65. — Ch. ed. nov. III. 



p. 294. — Hyalina Pfr. Vers. p. 123.) - - - 64. 



287. H. Lardyi Charpentier. 



T. vix perforata, depressa, tenuis, levissime striatula, 

 nitida, pellucida, corneo-albida; spira vix conoideo-elata, ver- 

 tice subtili; sutura profunda; anfr. 6 convexi, angusti, ultimus 

 ventrosus, non descendens; apertura parum obliqua, lunaris; 

 perist. simplex, rectum, raargine dextro antrorsum arcuato, 

 columellari ad perforationem brevissime rellexo. — Diam. maj. 9, 

 min. 8, alt. 5^2 nii"- (Mus. Charpentier.) 



Helix Lardrji Charp. in liti. 



— — Pfr. in Zeitschr. f. MaJa/c. 1853. p. 145. 



— — (Microcystis) Pfr. Vers. p. 123. 



Ilabitat in insula Opara. 



*■ 



288. egenula Wlor. (Coll. 113. — Ch. ,ed. nov. III. 



p. 317. — Rv. n. 1415. t. 201. — Microcysfis 



Pfr. Vers. p. 123.) Mon. in. p. 65. 



289. columellaris Pfr. (Coll. 114. — Ch. ed. nov. III. 



p. 417. t. 148. f. 8—10. — Erepta Pfr. Vers. 



p. 128.) - - - 65. 



290. oleosa Pfr. {Ch. ed. nov. III. p. 354. — Rv. n. 



1400. t. 201. — Microcystis Pfr. Vers. p. 123.) - - - 65. 



291. H. Thwaitesi Pfr. 



T. aperte perforata, convexo-depressa, striatula, nitida, 

 cereo-hyalina ; spira breviter conoidea, obtusula; sutura pro- 

 funda, submarginata ; anfr. 67^ convexi, arcte convoluti, ulti- 

 mus non descendens, basi inflatus; apertura verticalis, lunaris; 

 perist. reclum, acutum, margine columellari arcuatim oblique 



