754 GASTROPODA. [Pulmonata. 



Sculpture : Protoconch distinctly spirally striated ; on the following 

 whorls these microscopic spirals are obsolete, but distinct again on the 

 base ; growth-lines oblique, rib-striate. Colour pale corneous, regu- 

 larly radially banded with reddish-fulvous, the bands becoming obsolete 

 near the mouth and upon the base. Spire conical, slightly acute, 

 somewhat higher than the aperture ; outlines concave. Protoconch of 

 1^ whorls, rather large, globular. Whorls 5%, flattened ; periphery 

 sharply keeled, base slightly convex. Suture margined, not deep. 

 Aperture vertical, rhomboidal. Peristome thin, the outer and inner 

 margins subparallel. Outer lip sharply angled. Columella short, ver- 

 tical. Inner lip slightly reflected. Perforation rather narrow, deep 

 and open, about one-tenth of the greatest diameter of the shell. 



Diameter Maj., 3-75 mm. ; min., 3-25 mm. : height, 2-5 mm. 



Animal small, eye-peduncles long, the tentacles moderate ; body 

 elongate, foot slightly produced behind beyond the shell. Colour 

 pale-yellowish ; peduncles, a stripe on each side of the head, and 

 another short stripe in the middle on each side of the foot purplish- 

 grey (Hutton.) 



Dentiton. Button, T.N.Z.I., xvi, 168, pi. 9, f. S. 



Jaw arcuate, not tapering, papillate, with about 28 broad plaits. 



Radula having the formula 35 + 1 + 35 ; teeth normal. 



Type in the Canterbury Museum. Christchurch. 



Hob. 'South Island : Greymouth (Helms). 



26. Laoma microreticulata, Suter, 1890. Plate 30, fig. 2. 



Hyalina microreticulata, Sut., T.N.Z.I., xxii, 1889 (1890), 227, pi. 15, 

 f. 13, a, b. Laoma microreticulata, Sut., Man. Conch. (2), viii, 63, pi. 23, 

 f. 13-15. L. (Phrixgnathus) microreticulatus, Sut. : Hedley and Suter, 

 P.L.S. N.S.W., (2), vii, 648 ; Suter, J. de Conch., xli, 280. 



Shell minute, depressed, corneous, openly perforate, very thin, 

 shining, pellucid. Sculpture of the post-nuclear whorls consisting of 

 fine growth-striae, reticulated by microscopic fine spiral lines. Colour 

 horny-fulvous. Spire conoidal, its height equal to that of the aper- 

 ture ; outlines lightly convex. Protoconch convex, of 1| smooth 

 turns. Whorls 5, rounded, regularly increasing ; periphery and base 

 convex. Suture impressed. Aperture oblique, rotundly lunate. Peri- 

 stome straight, acute, margins faintly convergent. Columella short, 

 vertical. Inner lip somewhat expanded. Perforation narrow, deep, 

 open. 



Diameter, 1-7 mm. ; height, 1-3 mm. 



Dentition. Suter, T.N.Z.I., xxvi, 130, pi. 17, f. 22, 23. 



Jaw composed of about 18 separate, slightly papillate plaits. 



Radula. with the formula 27+1+27; central tooth unicuspid, 

 laterals and marginals bicuspid, the last exceptionally tricuspid. 



Type in my collection. 



Hob. North Island : Waitakerei Kange (H. S.) ; Hunua Kange 

 (Major Broun) ; Mount Pirongia (Urquhart) ; Waimarama (A. Hamil- 



