92 Transactions.— Zoology . 



Marginals quadi-augular, broader thauloug, \Yiththi-ee cutting- 

 points, the last only with a cutting-edge, sometimes with- 

 out it. 



Amphidoxa (Calymnai feredajri, Sut., vai-. glaciaUs, n. var. 



Shell small, globosely depressed, imperforate, silky, pale- 

 horny without markings, fragile, transparent, with very fine, 

 distinct, and close strise, arcuated on the surface and straight 

 beneath, about 60 in the tenth of an inch (25 per mm.). Sphe 

 almost flat. Whorls 3i, rapidly increasing, rounded. Suture 

 impressed. Aperture oblique, rotundly ovate. Peristome 

 thin, regularly arched, the upper part of the outer lip advanc- 

 ing. Colume'llai' mai-gin not reflected. Margins slightly con- 

 vergent. Umbilical region impressed, miperforate. 



Diameter, 0-14in. (3-5mm.) ; height, OOTiu. (l-7omm.). 



Hab. Under rotten wood in the subalpine bush ; very 

 scarce. South Island : White Horse Hill, Hooker Yallev. 

 (H. S.), 



Animal. — Jaw and dentition much the same as in the spe- 

 cies. 



This variety differs from the species only in the closer ribs 

 and the somewhat less elevated spire. 



Phrixgnathus acanthinulopsis, n. sp. Plate XYIIL, fig. 



11, a, h, S, T. 



Shell small, conoidal, umbilicated ; colour pale-homy with 

 regular broad streaks of rufous, faintly shining, transparent, 

 fr-agile. Epidermis with slightly-sinuated membranaceous 

 plaits, about 12 in the tenth of an inch (5 per mm.). Sphe 

 conoidal, rather depressed. Whorls 5, slowly but regularly 

 increasing, rounded ; periphery carinated. Suture impressed. 

 Apertm-e obhque, rotundly lunar. Peristome thin, straight, 

 the margins slightly approximating. The columellar margin 

 scarcely reflected, somewhat callous inside. Umbilicus mo- 

 derate, deep, open, one-fourth of the diameter. 



Diameter, 012in. (3mm.j ; height, 0-08in. (2mni.). 



Hab. Amongst dead leaves and mould in the subalpine 

 bush. Eather scarce. South Island : White Horse Hill, 

 Hooker Valley. (H. S.) 



This species is very near Ph. phnjuia, Hutt., but the spire 

 is more depressed and" the umbihcus larger. 



Anivial. — Jaw arcuate, not tapering, lamellate, the lamellae 

 flat, densely covered with hair-like papillae ; about five of the 

 central lamellae much broader than the others. 



Dentition : 21—1—21. Central tooth rectangular, much 

 longer than broad, reflesed portion nearly half the length of 

 the base, unicuspid, marginal teeth twice as broad as the 

 central tooth, bicuspid, the cutting-points gi-Ovving larger and 



