130 pulmonata. 



155. Nanina minutalis. 



Shell very minute, orbiculate depressed, white, glassy, faintly 

 striated ; whorls four and a half, moderately convex, narrow ; 

 umbilicus broad ; aperture rounded-semilunate, oblique, simple, 

 with sharp margins. Height 1, breadth 2 mill. {Desk.) 



Helix minutahs, Per. Mas.; Desk, in Fer. Hist. i. 83. n. 110 I 



(not figured). I 



Pfr. Mon. Suppl. 91 (compare Z.f. M. 1852, p. 152). 



Hab. Tahiti (Des/i.) ? 



156. Nanina cultrata. 



Shell small, orbicular, depressed, quite glabrous, shining, 

 greenish-brown, rounded beneath, and bent into an umbilical 

 pit, imperforate ; spire of five convex whorls, the last keeled 

 above ; apex obtuse ; suture margined ; aperture narrow, lunate ; 

 lip simple ; columella oblique, callous, white, plauulate, inflected, 

 resembhng a tooth below. Lat. -f^, alt. -^q poll. 



Helix cultrata, Gould in Proc. Bost. Soc. 1846, p. 172; Exped. 

 Shells, 1851, p. 46. f. 59. 



Pfr. Mon. Helic. i. 37. n. 55 a. 

 Hab. Tahiti and Eimeo. 



157. Nanina radians. 



Shell imperforate, depressed, thin, smooth, veiy shining, pel- 

 lucid, horn-coloured, irregularly radiated with whitish stripes ; 

 spire scarcely raised, convex ; suture impressed, a little mar- 

 ginate ; whorls four and a half, nearly flat, the last one not de- 

 scending, angular at its ujiper periphery, convex beneath and a 

 little impressed in the centre; aperture nearly peqiendicular, 

 lunate, angular ; peristome quite simple, straight, sharp. Height 

 4, greatest breadth 9, least breadth 8 mill. {Pfr.) 



Helix radians, Pfr. in Proc. Zool. Soc. 1851, p. ; Ic. n. 942. 

 t. 144. f. 22, 23; Mon. Suppl. 39. 

 Reeve, -a. 618. t. 110. 

 Hab. Island of Tahiti. 



158. Nanina calculosa. 



Shell small, glassy, fragile, shining, smooth, horn-coloured, 

 globose-pyramidal ; whorls four, moderately convex, the last an- 

 gular and slightly keeled at its periphery, convex beneath, im- 

 pressed in the umbiUcal regiou, but imperforate ; aperture lunate ; 



