88 Transactions. — Zoology. 



cecflingly scarce (one specimen only). South Island: White 

 Horse Hill, Hooker Valley. (H. S.) 



This shell represents a middle form between Patula infccta 

 and P. cornicidum. 



Animal not known, as I would not destroy the only speci- 

 men I have. 



Patula infecta, Eeeve, var. alvestris, n. var. 



The shell of this variety differs from P. infecta, E., by its 

 different colom-, it being cinereous-rufous with only a few pale- 

 horny streaks. The ribs are stouter and more distant, about 18 

 in the tenth of an inch (7 per mm.). The whorls number only 

 4-|^ to 5 ; they are somewhat broader, less rounded, and the 

 sutm-e, in consequence, less impressed. The peristome has no 

 callosity inside. 



Diameter, 0-12in. (3mm.) ; height, 0-06in. (l-5mm.). 



Hah. Amongst decaying leaves in the subalpine bush. 

 Scarce. South Island : White Horse Hill, Hooker Vallev. 

 (H. S.) 



Animal unknown. 



Patula bianca, Hutt., var. vwntana, n. var. Plate XVII., fig. 

 K, L. 



Shell differs from the type by its larger size, by the darker 

 colour, this being fuscous without any streaks, and the coarser 

 and more distant ribs, there being only about 35 in the tenth 

 of an inch (li per mm.). 



Diameter, 0-llin. (2-75mm.) ; height, 005in. (l-25mm.). 



Hab. Under rotten wood and dead leaves in the subalpine 

 bush. South Island: White Horse Hill, Hooker Vallev. 

 (H. S.) 



Patula bianca, Hutt., is also found in the same locality, 

 but rather scantily, and it differs a little Irom the type by 

 the diameter being never over 0-08in. (2mm.), by ha\^ng four 

 whorls, and by the ribs being more distant, about 50 instead 

 of 55 in the tenth of an inch. 



_ Animal. — Jaw very thin, almost straight, not tapering, 

 faintly striated, no median projection. 



Dentition : 13—1—13 ; laterals, 4 or 5. Central tooth rect- 

 angular, longer than broad, refiexed portion tricuspid, middle 

 cusp reaching about two-thirds of the length of the base, all 

 the cutting-points short. Laterals a little broader than the 

 central tooth, but similar in shape, the middle cusp with its 

 short cutting-point reaching to the posterior margin of the 

 base. Marginals much broader than long, especiallv the outer 

 ones ; with three stout cutting-points, of which the two inner 

 ones are more developed. Last marginal minute, bidentate. 



