68 HELIX-ALLODISCUS. 



margin descending, then arched ; columellar margin thickened, 

 rapidly ascending and slightly reflected ; basal margin rather flat- 

 tened ; interior slightly callous. 



Greatest diameter '15, least ] 2 ; height '6 inch. (Hutt.} 



Auckland and Greymouth, New Zealand. 



Charopa planulata HUTT., Trans. N. Z. Inst. xvi, p. 181, t. 9, f. I 

 (dentition). Psyra planulata HUTT., Ibid. p. 202. 



In the specimen figured there are about 21 riblets per millimeter 

 upon the front of the body-whorl at the periphery. 



G. MIRANDA Button. PI. 22, figs. 40, 41, 42. 



Shell minute, depressed, imperforate, finely ribbed ; color pale 

 horny, tessellated with rufous. Spire flatly conoidal, obtuse; 

 whorls 5-6, rounded, very slowly increasing; the first smooth, the 

 second and third with rather distant, delicate ribs, which get closer 

 and after the third whorl are very close and fine, about fifty in the 

 tenth of an inch ; umbilicus very narrow, covered ; suture impressed ; 

 aperture subvertical, lunate ; peristome simple, about three-fourths 

 of a circle, the columellar margin slightly callous and reflected. 

 Greatest diameter '15, least '14, height '11 inch. (Hutt.} 



Animal : mantle subcentral ; tail truncated, with a mucus gland 

 below a papilla ; eye peduncles thick, approximated at their bases. 

 Anterior portion of the animal, including the eye peduncles and 

 tentacles, pale purplish, the peduncles darker ; a narrow white line 

 down the back; foot and the rest of the body yellowish-white. 

 (HutQ 



Greymouth, New Zealand. 



Charopa miranda HUTT., Trans. N. Z. Inst. xvi, p. 180, t. 9, f. w, 

 t. 11, f. 8 (dentition and jaw). Psyra miranda HUTT., Ibid. p. 202. 



My figures are drawn from Prof. Hutton's type. 



G. GODETI Suter. PI. 22, figs. 43, 44, 45. 



Shell discoidal, perforated, color horny, without any markings, 

 not shining, transparent, thin, with strong, rather distant, and 

 almost straight radiating ribs, about 23 in the tenth of an inch (9 

 per mm.). Spire flat. Whorls 5, slightly rounded, narrow, regu- 

 larly increasing, the last not descending. Suture impressed. 

 Aperture subvertical, lunar, considerably excavated by the penulti- 

 mate whorl. Peristome straight, simple, basal margin slightly 



