pulmonata. 135 



168. Naxina subtilis. 



Shell imperforate, depressed, very thin, bright, pale homy ; 

 spire scarcely exserted ; whorls four and a half to five, nearly 

 level, gradually increasing, the last a little more convex at the 

 base ; suture sometimes red-margined ; aperture transversely 

 lunar ; peristome simple, acute. Lat. maj. 6, min. 5^, alt. 3^ mill. 



Helix subtilis, Anton, Verz. 35. n. 1327. 



Chemn. ed. 2, Helix, n. 209. t. 29. f. 33-35. 



Pfr. Mon. Helic. i. 33 ; Ic. i. 236. 



Reeve, n. 626. t. 111. 

 Helix vitrinella, Pfr. Symb. ii. 41. 

 Helicopsis vitrinella. Beck, hid. 2 [Anton). 

 Nanina (Microcystis) subtilis, Alb. 60. 

 Hab. Oheatora Island. 



169. Nanina spiralis. 



Shell orbiculate, subconoidal, umbilicated, luteous, sculptured 

 with numerous radiating strife, sometimes obsolete ; spu-e ob- 

 tuse ; whorls five, depressedly-convex, the lowest ornamented 

 with a decurrent purplish-black band above the middle ; umbi- 

 licus very narrow, deep ; aperture semiovate ; lip acute, scarcely 

 reflected at the umbilicus. Lat. 34, alt. 20 mill. 



Helix spiralis, Le Guill. Revue Zool. 1845, p. 188. 



Pfr. Mon. Helic. i. 53. 



Reeve, n. 408. t. 77 ? 

 Hab. Arrow Island. 



m. "New Zealand. 



170. Nanina Mari^. B.M. 



Shell imperforate, nearly lenticular, rather thin, slightly striate, 

 shining, greenish horn-coloured, indistinctly marked with nar- 

 row oblique bro\Miish stripes ; spire conoidal, with the outlines 

 convex and the apex acuminate ; suture bordered ; whorls five 

 and a half, rather flat, acutely carinate,the last one not descending, 

 rather convex beneath and obsoletely spotted with brown ; aper- 

 ture oblique, depressed, nearly triangular; peristome simple, 

 sharp, straight, with the basal margin very slightly arcuate and 

 shortly reflected at the columella. Height 3f , greatest breadth 

 7i, least breadth 7 mill. {Pfr.) 

 Nanina Marise, Gray in Dieffenb. Trav. i. 262. 

 Helix Maria;, Pfr. Mon. i. 81. n. 192; Ic. n. 1045. t. 155. 



f. 40-42 ; Mon. Siippl. 39. 

 Reeve, n.S04. t. 131. 

 Helix umbraculum, Pfr. in Proc. Zool. Soc. 1851. 

 Hai. New Zealand. 



