758 GASTROPODA. [Pvlmonata. 



' i 



stome straight, acute. Outer Up sharply angled : basal tip broadly 

 arched. Columella subvertical, slightly arcuate. Inner lip a little 

 callous, expanded above. Perforation narrow, deep,- open. 



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



Animal unknown. 



Type in my collection. 



Hab. South Island : Pelorus Sound (McMahon). 



32. Laoma Trailli, Suter, 1909. Plate 30, fig. 5. 



Laoma (Phrixgnathus) Trailli, Sut., P. Mai. S., viii, 1909, 261, pi. 11, f. 25. 



Shell small, turbinate, perforated, corneous with light-brown zigzag 

 lines, thin, pellucid, polished. Sculpture : The shell has very fine 

 growth-lines, and obsolete microscopic spiral striae on the base. Colour 

 corneous, with very faint axial narrow brown zigzag lines, sometimes 

 indistinct or absent. Spire conoidal, convex, its height the same as 

 that of the aperture. Protoconch blunt, smooth. Whorls 6, slowly 

 and . regularly increasing, convex ; periphery sharply angled, base 

 rounded, broadly infundibular around the perforation. Suture im- 

 pressed, very lightly and narrowly margined below. Aperture lunate, 

 transverse, oblique. Peristome sharp, simple, with an inner white 

 callus. Outer lip angled. Columella short, oblique. Inner lip ex- 

 panded. Perforation deep, narrow, open, about one-fifth of the greatest 

 diameter. 



Diameter, 4-5 mm. ; height, 3-2 mm. 



Animal unknown. 



Type in my collection. 



Hab. New Zealand, exact locality unknown (collected by the late 

 Mr. C. Traill). 



33. Laoma transitans, Suter, 1892. Plate 30, fig. 6. 



Phrixgnathus transitans, Sut., T.N.Z.I., xxiv, 1891 (1892), 297, pi. 22, f. 40, 



a, b. Laoma transitans, Sut., Man. Conch. (2), viii, 59, pi. 23, f. 85-87. 

 L. (Phrixgnathus) transitans, Sut. : Hedley and Suter, P.L.S. N.S.W. (2), 

 vii, 651 ; Suter, J. de Conch., xli, 282. 



Shell small, depressed turbinate. openly perforate or subperforate. 

 corneous with faint brown bands, smooth, periphery keeled, thin, 

 semitransparent, faintly shining. Sculpture : Fine growth-lines, and 

 obsolete microscopic spiral lines on the base. Colour yellowish-horny, 

 with faint somewhat irregular radiate bands of light brown. Spire 

 conoidal, apex rather obtuse, its height equal to that of the aperture : 

 outlines convex. Protoconch broadly convex, smooth. Whorls 5 to 

 5|, slowly and regularly increasing, lightly convex ; periphery acutely 

 keeled, base convex. Suture not deep, narrowly margined, some- 

 times inconspicuous. Aperture oblique, subrhomboidal. Peristome 

 thin, sharp, strongly callous within, the callosity extending far back. 

 Outer lip sharply angled. Columella short, arcuate. Inner lip with a 



