Laoma.] GASTROPODA. 737 



increasing, flattened, the last subangulated ; base flatly rounded. 

 Suture not deep, simple. Aperture oblique, lunate, with 6 lamellae 

 in the adult 2 or 3 on the parietal wall, the inner of which is stouter 

 and longer ; 2 very thin lamellse on the outer wall, the upper one 

 smaller, inconspicuous ; 2 strong lamella upon the base, the inner 

 one at the base of the columella : in younger specimens there are 

 only 4 lamellae, those on the outer wall are not developed. Peri- 

 stome thin, sharp, but strongly callous within in adult specimens. 

 Columella very short, vertical. Inner lip slightly reflexed and almost 

 completely sealing up the very narrow perforation. 



Diameter, 2 mm. ; height, 1-9 mm. 

 Animal unknown. 

 Type in my collection. 



Hob. North Island : Mount Pirongia, type (Urquhart) ; Toko, 

 Stratford (R. Murdoch). 



6. Laoma poecilosticta, Pfeiffer, 1853. Plate 11, fig. 2. 



Helix poecilosticta, Pfr., M.H. Viv., iii, 1853, 59. H. poscilocostnto, Pfr., 

 P.Z.S., 1852 (1854), 147 (err.). H. pcecilostict'i, Pfr. : Reeve, Conch. 

 Icon., vii, pi. 132, f. 815; Conch. Cab. (2), i, 470, pi. 156, f. 11-13. 

 H. (Thalassia) pcecilosticta, Pfr. : Hector, Cat. Land Moll. N.Z., 8. 

 Nanina (Thalassia) pcecilosticta, Pfr., Nomencl. Hel. Viv., 47. Helix 

 poecilosticta, Pfr. : Hutton, M.N.Z.M., 17. Endodonta poecilosticta, Pfr. : 

 Hutton, T.N.Z.I., xvi, 195. Helix (Endodonta) poecilosticta, Pfr. : 

 Tryon, Man. Conch. (2), iii, 68, pi. 13, f. 56. Laoma pcecilosticta, Pfr. : 

 Hedley and Suter, P.L.S. N.S.W. (2), vii, 646 ; Suter, J. de Conch., 

 xli, 274. 



Shell very small, trochiform, subperf orated, thin, closely plaited, 

 horny with rufous spots, suture margined, last whorl keeled. Sculp- 

 ture : Protoconch microscopically very finely spirally striated ; the 

 following whorls with close oblique retractive flattish riblets, about 

 15 per millimetre ; the interstices with fine growth-lines, and very 

 fine, often obsolete, spiral strise, usually more distinct on the base. 

 Colour fulvous or horny, spotted with reddish-brown, the cord above 

 the suture regularly dotted with horny and brown. Spire conical, 

 slightly higher than the aperture ; outlines somewhat convex. Pruto- 

 conch of 1J convex turns. Whorls 5, narrow, somewhat convex, 

 the last keeled ; base flatly rounded. Suture deep, margined above 

 by a narrow cord on the lower whorls only. Aperture a little oblique, 

 depressed, angularly lunate, with an entering thick lamella on the 

 middle of the columella. Peristome simple, straight, strengthened 

 inside by a white callus. Columella short, oblique. Inner lip with 

 a thick callosity, reflexed, and almost completely closing the narrow 

 perforation. 



Diameter, 4 mm. ; height, 3-25 mm. 



Dentition. Hutton, T.N.Z.I., xvi, 168. 



24 Moll. N.Z. 



