88 HELIX-MAORIAXA. 



The figures of this species, as well as of the others, were drawn 

 by Mr. Suter from the type specimens. 



P. WAIRARAPA Suter. PI. 24, figs. 36, 37, 38, 39. 



Shell depressed, small, light horny-brown with brown streaks, 

 which are irregular in breadth, faintly shining, fragile, with close and 

 fine ribs, which are somewhat undulating. Ribs about 38 in the 

 tenth of an inch (15 per mill.). Spire little elevated, nearly flat. 

 Whorls 6, slowly increasing, narrow, the last not descending, 

 rounded. Suture deeply impressed. Aperture slightly oblique, 

 lunately rounded, considerably excavated by the penultimate whorl. 

 Peristome straight not dilated, acute, margins slightly convergent. 

 Columellar margin riot reflected, descending. Aperture with 16 

 laminae 5 on the penultimate whorl, 1 on the columella, and 10 on 

 the palatal wall. Of the laminae on the penultimate whorl the four 

 inferiors are close together, the superior at some distance, all show- 

 ing the same development. The lamina on the columella is more 

 developed, conical. The laminae on the palatal wall are fine, long 

 and nearly regularly distributed over the whole surface. Umbilicus 

 wide, perspective, deep, one-third of the diameter. 



Alt. 0-4, diam. 1>75 mill. (Suter.} 



Hastwell, Forty mile Bush, North /., New Zealand, under rotten 

 bark in the bush. 



Helix ivairarapa SUTER, Trans. N. Z. Inst. xxii, p. 222, t. 14, f. 

 2a-c. 1889. Maoriana wairarapa SUTER, 1. c. 1891, p. 298, t. 23 f. 

 45 (dentition.) 



P. PSEUDOLEIODA Suter. PI. 24, figs. 40, 41, 42, 43. 



Shell small, globose, yellowish-white, banded with somewhat back- 

 wards directed brown streaks, faintly shining, closely ribbed, ribs 

 on upper surface straight, a little undulating outside; ribs about 38 

 in the tenth of an inch (15 per mm.). Spire globosely elevated, less 

 rounded at the base. Whorls 6, round, very slowly increasing, the 

 last not descending. Suture pretty deep. Aperture lunately 

 rounded, slightly oblique, excavated by the penultimate whorl. 

 Peristome straight, not dilated, acute, margins distant, columellar 

 margin slightly descending. Aperture with 12 laminae 3 on the 

 penultimate whorl, 1 on the columella, and 8 on the palatal wall. 



The lowest plait on the penultimate whorl is strongly developed ; 

 the plait on the columella also is relatively large, tongue-shaped; 

 the laminae on the palatal wall are fine, long, the four lower ones 



