PULMONATA. 137 



Helix rufa, Less. Voy. de la Coq. 305. t. 13. f. 2. 



Chemn. ed. 2, Helix, n. 540. t. 87. f. 4, 5. 



Pfr. Moil. Helic. i. 73. 



Reeve, n. 193. t. 42. 

 Nanina (Hemiplecta) rufa, Alb. 60. 

 Nanina exilis, var.. Beck, Ind. 4. 

 Hub. Mauritius. New Ireland? 



174. Nanina calamechroa. 



Shell perforated, globosely-depressed, thin, bright, pellucid, 

 straw-coloured, regularly striated transversely, decussated by very 

 line spiral lines, scarcely visible with the naked eye ; whorls five 

 and a half, increasing gradually; aperture lunar; ])eristome 

 simple, acute. Lat. niaj. 17, min. 15^, alt. 8 mill. 



Helix calamechroa, Jonas in Phil. Icon. i. 3. 47. t. 3. f. 2. 

 Pfr. Mon. Helic. i. 57; Ic n.816. t. 129. f. 11, 12. 

 Helix tenera, Jonas, olim. 

 Nanina (Xesta) calamechroa. Alb. 59. 

 Macrochlamys, Morch, Cat.Yold. 2. 



Hub. Guinea. 



Habitat unknown. 



175. Nanina liturata. 



Shell imjjerforate, tm-binate-semiglobular, rather solid, striated 

 and minutely wrinkled, rather shining, reddish with browTiish 

 bands, which are broken into single points or letter-like stripes ; 

 spire depressedly turljinate ; ajiex rather pointed ; whorls five, 

 moderately convex, the last one descending imperceptibly, roimded 

 and marked with a chestnut-coloured peripherical band, which is 

 divided into regular square spots, rather convex beneath ; aper- 

 ture diagonal, roundish-lunate ; peristome simple, with the right 

 margin imperceptibly expanded and the columellar one a little 

 callous. Height 15, greatest breadth 23, least breadth 20 mill. 

 (Pfr.) 

 Helix liturata, Pfr. in Proc. Zool. Sac. 1851, p. ; Ic. n. 931. 



t. 142. f. 13, 14 ; Mon. Suppl. 31. 

 Locality unknown. 



176. Nanina insculpta. 



Shell imperforate, depressed, slightly convex on each side, len- 

 ticular, sharply keeled, rather sohd, chestnut, sculptured above 

 with close-set ribs and with a spiral line parallel to the keel; 

 whorls five, planulate, the last smooth beneath, marked with an 

 impressed line near the keel ; columella ai-med with a single. 



