Lauma.] GASTROPODA. 743 



Inner lip with a thin callosity, reflexed and almost completely covering 

 the narrow perforation. 



Diameter Maj., 3-25 mm. ; min., 3 mm. : height, 2-5 mm. 



Jaw and radula normal. Formula of the latter 32 + 1 + 32. 

 Central tooth unicuspid, lateral and marginal teeth bicuspid, all with 

 minute points. 



Type in the Canterbury Museum, Christchurch. 



Hob. North Island : Cape Camel ; Whangarei ; Hokianga ; Wade ; 

 Little Barrier Island ; Auckland (type) ; Waitakerei Range ; Thames ; 

 Hunua Range ; Wairangi ; Ohaupo ; Mount Pirongia ; Ngaputahi and 

 Ruatahuna, Tuhoe-land ; Ormondville ; Forty-mile Bush ; Wanganui ; 

 Toko, near Stratford ; Dannevirke ; Wellington. South Island : Nelson. 



6. Laoma Cheesemani, Suter, 1894. Plate 10, figs. 13, a, 136. 



Phrixynathus Cheesemani, Sut., T.N.Z.I., xxvi, 1893 (1894), 137, pi. 21, 

 f. 40-406. Laoma (Phrixgnathus) Chee*< muni. Sut., J. de Conch., xli, 

 282. 



Shell small, conoidly semiglobose, subperforate, corneous, thin, 

 rather shining, diaphanous. Sculpture : Protoconch and succeeding 

 whorls with microscopic fine spiral lines, not always very distinct on 

 the upper surface ; growth-striae somewhat irregular, close, oblique. 

 Colour pale-horny, sometimes variegated with light-brown zigzag bands, 

 which are close together, and tessellating on the base. Spire conoidal, 

 its height equal to that of the aperture ; outlines convex. Protoconch 

 of 1J turns, flatly rounded. Whorls 6, slowly and regularly increasing, 

 slightly convex ; periphery keeled, base flatly rounded. Suture not 

 much impressed, very narrowly margined. Aperture oblique, broadly 

 lunate. Peristome simple, straight, acute. Outer lip angled, slightly 

 callous within. Columella short, arcuate. Inner lip callous, reflexed, 

 and almost completely closing up the very narrow perforation. 



Diameter Maj., 4-5 mm. ; min., 4-1 mm. : height, 3 mm. 



Jaw and radula normal ; formula of the latter 40+ 1 + 40. 



Type in my collection. , 



Hab. Waitakerei Range (Cheeseman). 



| 



7. Laoma conella, Pfeiffer, 1862. Plate 29, tig. 9. 



Helix conella, Pfr., Mai. BL, viii, 147; M.H. Viv., v, 86; M.N.Z.M., 17. 

 Nanina (Thalassia) conella, Pfr., Nomencl. Hel. Viv., 47. Phrixynalhu* 

 conella, Pfr. : Button, T.N.Z.I., xvi, 196. Laoma conella, Pfr., Man. 

 Conch. (1), viii, 58, pi. 23, f. 16. L, (Phrixgnathus) conella, Pfr. : 

 Hedley and Suter, P.L.S. N.S.W. (2), vii, 647 ; Suter, J. de Conch., xli, 

 277. 



Shell very small, depressed turbinate, subperforate, keeled at the 

 circumference, silky, thin, pellucid. Sculpture consisting of very 

 delicate oblique growth-striae, about 60 per millimetre, crossed by 

 faint microscopic spiral lines. Colour horny, with close irregular 

 stripes of tawny brown, which radiate below and descend obliquely 



