224 Transactions. — Zoology. 



convergent; colmnellar margin descending, not reflected. 

 Aperture with 12 laniinte — 1 on the penultimate whorl, 2 on 

 the columella, and 9 on the parietal wall. The lamina on the 

 penultimate whorl is a little above the centre, high, rather 

 thin, and forked by a deep and broad groove. The two laminEe 

 on the columella are stout, with large base, and tongue-shaped, 

 the first rather sharp. The nine lamellae on the parietal wall 

 are fine and long — the five lower ones a httle stouter, and 

 separated from the other four by a somewhat larger interval. 

 Umbihcus deep, perspective, not very broad, about one- 

 quarter of the diameter. 



Diameter, 0-08in. (2mm.); height, 0-05in. (l-2omm.). 



Hah. Under dead leaves and rotten wood in the subalpine 

 bush. Eather scarce. Middle Island : Environs of the Mount 

 Cook Hermitage. (H. S.) 



This species is closely allied to H. microunchdata, but it is 

 somewhat larger, more globose, with stronger and more dis- 

 tant ribs. The laminae of the aperture are nearly equal in 

 both species, but II. aorangi has only nine laminas on the 

 parietal wall. 



Helix 'pscudolcioda, wairarapa, hectori, microundulata , 

 aorangi, and H. Icioda, Hutton, form together a peculiar 

 and, I think, quite new^ gi'oup, to which I propose to give the 

 name of Hiittonella, in honour of Prof. F. W. Hutton, who 

 first described a species of this group. 



Patula infecta, Eeeve, var. irregularis, n. var. Plate XIV., 

 fig. 6, a, h. 



Shell depressed, subdiscoidal, yellowish-white with distant 

 light-brown streaks vanishing on the base, slightly shining, 

 rather thin, transparent ; strongly plaited, plaits directed for- 

 wards on the surface, and a little undulated descending ; about 

 30 in the tenth of an inch (12 per mm.). The ribs are irregu- 

 larly developed and distant. Spire slightly elevated. Whorls 

 5^ to 5, narrowly rolled up, very slowly increasing, rounded, 

 the last very slightly descending. Suture not deep. Aperture 

 rotundly lunar, but little excavated by the penultimate whorl, 

 slightly oblique. Upper margin advancing. Margins straight, 

 convergent, acute ; columellar margin nearly vertically de- 

 scending. The parietal wall inside a little callous, white. 

 Umbilicus broad, perspective, showing all the whorls, about 

 one-third of the diameter. 



Diameter, 0T2in. (3mm.) ; height, 0-06in. (1-omm.). 



Hab. Under rotten logs and dead leaves. Very scarce. 

 North Island : Forty-mile Bush ; Hastwell. 



This variety is distinguished from P. infecta by the slightly- 

 elevated spire, the faint indistinct markings ; it is narrower- 

 ribbed, the ribs being irregular in distance and development ; 



