222 Transactions. — Zoology. 



Diameter, 0-09in. (2-25niin.) ; height, 0-06in. (l-5mm.). 



Hab. Under rotten wood and bark in the bush. Not com- 

 mon. North Island : Forty-mile Bush ; Hastwell, Maurice- 

 ville. (H. S.) 



The external appearance is nearly the same as in Helix 

 leioda, Hutton : that is why I gave it the name of pseudo- 

 leioda. It is easily distinguished from H. leioda, Hutt., 

 having only 12 laminae in the aperture, whilst the other 

 has 18. 



Helix wairarapa, n. sp. Plate XIV., fig. 2, a-c. 



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. 

 Eibs about 38 in the tenth of an inch (15 per mm.). Spire 

 little elevated, nearly flat. Whorls 6, slowly increasing, 

 narrow, the last not descending, rounded. Suture deeply 

 impressed. Aperture slightly oblique, Innately rounded, con- 

 siderably excavated by the penultimate whorl. Peristome 

 straight, not dilated, acute, margins slightly convergent. 

 Columellar margin not reflected, descending. Aperture with 

 16 laminae — 5 on the penultimate whorl, 1 on the columella, 

 and 10 on the parietal wall. Of the laminae on the penulti- 

 mate whorl the four inferiors are close together, the superior 

 at some distance, all showing the same development. The 

 lamina on the columella is more developed, conical. The 

 lamina} on the parietal wall are fine, long, and nearly regu- 

 larly distributed over the whole surface. Umbilicus wide, per- 

 spective, deep, one-third of the diameter. 



Diameter, 0'07in. (l-75mm.) ; height, 0-04in. (1mm.). 



Hah. Under rotten bark in the bush. Not common. 

 North Island : Forty-mile Bush ; Hastwell. (H. S.) 



Helix hectori, n. sp. Plate XIV., fig. 3, a-c. 



Shell small, depressed, discoidal, light horny brown with 

 large close brown streaks, not shining, fragile, transparent 

 closely ribbed, ribs nearly straight, about 38 in the tenth of 

 an inch (15 per mm.). Spire nearly flat. Apex bare of epider- 

 mis, light-grey. Whorls 5, very slowly but regularly in- 

 creasing, rounded, the last not descending. Suture impressed. 

 Aperture slightly oblique, rotundly lunar, excavated by the 

 penultimate whorl. Peristome acute, straight, margins con- 

 vergent. Columellar margin not reflected, descending. Aper- 

 ture with 14 laminae — 5 on the penultimate whorl, 2 on the 

 columella, and 7 on the parietal wall. On the middle of the 

 penultimate whorl is a stout lamina, which is divided in two 

 by a deep groove, thus getting forked ; the other four smaller 

 laminae are below this one. The lamina on the columella are 



