740 GASTROPODA. [Piilm,/<il<i. 



callus, reflexed, completely covering the very narrow perforation, 

 which is open in young examples. The nn/hil/cul rrf/inn is broadly 

 impressed. 



Diameter Maj., 3 mm. ; min., 2-75 mm. : height, 2mm. 



fair and radula are typical. The formula of the latter is 

 20+1 + 20. 



Type in my collection. 



Hob. North Island : Near Auckland (Wright). 



3. Laoma Marise, Gray, 1843. Plate 29, tig. <1 



Nanina Marice, Gray, Dieff. N.Z., 2H2. Helix M<in<t, (Jiay, Conch. Icon., 

 vii, pi. 131, f. 804 ; M.H. Viv., i, 81 ; Conch. Cab. (2), i, pt. 2, 462, 

 pi. 155, f. 40-42 ; Cat. Brit. Mus. Pulmonata, 135 ; Ereb. & Ter., 1, 

 pi. 1, f. 2. H. (Thalassiu) M'in'<r. Gray : Hector, Cat. Land Moll. N.Z., 

 5; Nomencl. Hel. Viv., 46. Nanina Marice, Gray : Hutton, M.N.Z.M., 

 25. Phrixgnathus Marice, ({ray : Hutton, T.N.Z.I., xvi, 196. Helix 

 (Phrixgnuth'us) Mm -ice, Gray, Man. Conch. (2), iii, 37, pi. 21, f. 11. 

 H. umbraculnm, Pfeiffer, P.Z.S., 1852 (1854). 147 ; M.H. Viv., iii, 39. 

 Lantna (Phrixgnathus) Mtiriu, Gray: Heclley and Suter, P.L.S. N.S.AV. 

 (2), vii. <>47 ; Suter, J. de Conch., xli, 275. 



Shell small, imperforate, somewhat lentiform. rather thin, very 

 faintly shining, corneous with fine brown zigzag lines. Sculpture 

 consisting of very fine oblique rib-strife, about 20 per millimetre, 

 crossed by microscopic fine and dense spiral lines, almost obsolete on 

 the embryonic whorls. (Colour corneous, with fine and close ante- 

 current rufous zigzag lines ; suture and periphery ornamented with 

 equidistant small brown spots. Epidermis thin, unctuously glossy. 

 Spire conoidal, very little higher than the aperture ; outlines lightly 

 convex. Protoconch pointed, of 1| turns. Whorls 5 to 5|, flattish, 

 periphery acutely keeled ; base convex, slightly impressed at the 

 centre. Suture distinctly margined on the lower whorls. Aperture 

 oblique, depressed, subtriangular. I'erixlo-me simple, acute, straight. 

 Outer Up sharply angled. Columella short, arcuate. Inner lip slightly 

 callous, shortly reflected above. There is a narrow false umliiJ/ens. 



Diameter Maj., 7-5 mm. ; min.. 7 mm. : height. 3-7 mm. 



Dentition. Hutton, T.N.Z.I., xvi, 172, pi. 9, f. R. 



Jaw arcuate, not tapering, papillate, with about 33 plaits. 



Radula having the formula 47 + 1 + 47 ; central tooth with 

 1 long cutting-point ; laterals and marginals bicuspid, the inner 

 cutting-point longer than the outer. 



Type in the British Museum. 



Hob. North Island : Whangarei : \Yude ; Auckland : Waiheke 

 Island ; Thames ; Hunua Range ; Tuakau ; Wairangi ; Tirau ; 

 Ohaupo ; near Waitomo Caves; Tanikenga ; Mount Pirongia ; 

 Heretaunga ; AVaiiganui ; Mount Egmont, 3,000 ft. to 4,500ft.; Nga- 

 putahi and Ruatahuna, Tnhoe-lami : Seventy-mile Bush ; Forty-mile 

 Bush ; Wellington. 



