PULMONATA. 85 



descending very obliquely, very slightly reflected above. Lat. 

 maj. 2(), min. 23, alt. 13 mill. 



Helix Theodori, Phil, in Zeitschr.f. Malak. 1846, 191. 



Chemn. ed. 2, Helix, n. 6S7. t. 110. f. 1-3. 



Pfr. Mon. Helic. i. /O. 

 Nanina (Hemiplecta) Theodori, Alb. 60. 

 Hab. E. Indies ; Mergui. 



33. Nanina bistrialis. B.M. 



Shell slightly perforated, globosely depressed, thin, fragile, 

 very finely striated, under a lens decussated with close, obsolete 

 striae, horny straw-coloured, zoned in the middle with two close 

 red lines ; spire scarcely convex ; whorls four, nearly level, 

 rajjidly increasing ; aperture ample, lunar-oval ; peristome simple, 

 columellar margin recurved. Lat. maj. 31, min. 25, alt. 15 mill. 



Nanina bistrialis. Beck, Ind. 2. 



Pfr. Symb. ii. 17- 



Alb. 59 (Xesta). 

 Helix bistrialis, Chemn. ed. 2, Helix, n. 61. t. 11. f. 10. 11. 



Pfr. Mon. Helic. i. /I ; Ic i. 90. 



Desk. 186. n. 249. 



Reeve, n. 483. t. 90. 

 Helix exihs, Chemn. ix. pt. 2. 121. t. 129. f. 1149; not Mid/. 



{Helicella) Per. Pr. 236; Hist. t. 92. f. 1. 

 Hehx diaphana. Lea, Obs. i. 166. t. 19. f. 65 (not Lam.). 

 Hab. Pondicherry, Trauquebar. 



34. Nanina vitellina. 



Shell perforate, depressed-globose, scarcely shining, brownish 

 orange-coloured, very minutely decussated above ; spire shortly 

 conoidal, rather blunt ; whorls live and a half, moderately convex, 

 the last one somewhat descending anteriorly, scarcely striate 

 below its periphery, which sometimes is obsoletely angulated, 

 white round the umbilicus, which is contracted and extremely 

 narrow ; aperture oblique, lunate-rounded ; peristome simple, 

 with the margins distant, columellar margin white, thickened 

 and reflected, rather dilated above. Height 18, greatest breadth 

 29, least breadth 24 mill. {Pfr.) 



Helix vitellina, Pfr. in Proc. Zool. Soc. 1848, 109; Z.f.M. 

 1848, 92 ; Ic. u. 763. t. 122. f. 22, 23 ; Mon. Supj}l. 72. 

 Reeve, n. 390. t. 75. 

 Hab. Base of the Neilgherries {Jerdon, Bcnscn). 



