678 GASTROPODA. [Pulmonatn. 



Jaw arcuate, tapering, consisting of numerous vertical parallel 

 lamellae. 



Dentition. Formula of teeth 13+7+1+7+13. Central and 

 lateral teeth tricuspid, marginals with 3 cutting-points. 



Type in my collection. 



Hab. North Island : Forty-mile Bush, type (H. S.) ; Huuua 

 Range (Major Broun) ; Otaki Gorge (Preston). Stewart Island : 

 Half -moon Bay (A. Hamilton). 



Subsp. glacialis, Suter, 1891. 



Amphidoxus (Calymna) Feredayi, Sut., var. glacialis, Sut., T.N.Z.I., xxiii, 

 1890 (1891), 92. Flammulina (Calymna) Feredayi glacialis, Sut. : Hedley 

 and Suter, P.L.S. N.S.W. (2), vii, 645 ; Suter, J. de Conch., xli, 242. 



Shell very small, globosely depressed, imperforate, .silky, fragile, 

 transparent, finely restate. Sculpture consisting of very fine dis- 

 tinct and close striae, arcuate above, straight on the base, about 25 per 

 millimetre. Spire almost flat. Protoconch smooth, but microscopic- 

 ally spirally striate, of 1J tightly convex volutions. Whorls 3|, 

 rapidly increasing, rounded ; base with an infundibuliform depression 

 in the centre. Suture impressed. Aperture oblique, rotundly ovate. 

 Peristome thin, regularly arched, the upper part of the outer lip ad- 

 vancing ; margins slightly convergent. Columnar margin not re- 

 flexed. 



Diameter, 3-5 mm. ; height, 1-75 mm. 



Animal with a caudal mucous gland. 



Jaw and radula much the same as in the species. 



Type in my collection. 

 Hob. Hooker Valley (H. S.). 



Remarks. The subspecies differs from the species mainly in the 

 much closer and finer riblets, and the somewhat less-elevated spire. 



8. Flammulina Jacquenetta, Hutton, 1883. Plate 9, fig. 11, a, b. 



Amphidoxa Jacquenetta, Hutt., N.Z.J.S., i, 1883, 476 ; T.N.Z.I., xvi, 179, 

 pi. 10, f. C ; I.e., 198. Gerontia (Calymna) Jacquenetta, Hutt. : PUsbry, 

 Man. Conch. (2), viii, 76, pi. 20, f. 70-72. Flammulina Jacquenetta, 

 Hutt. : Hedley and Suter, P.L.S. N.S.W. (2), vii, 643 ; Suter, J. de 

 Conch., xli, 240. 



Shell small, perforate, flattened, keeled, thin and fragile. Sculp- 

 ture consisting of delicate growth-striae, very finely and irregularly 

 diagonally reticulated, and crossed with faint distant spiral stria-. 

 Colour pale brown. Spire flat or very slightly convex. Whorls 2|, 

 rapidly increasing, very slightly convex, the last acutely keeled and 

 rounded on the lower surface. Suture impressed. Aperture oblique, 

 subrhomboidal, much broader than high. Peristome simple, straight. 



