STJTER : ON MOLLUSC A FROM NEW ZEALAND. 261 



light-brown streaks. Epidermis thin, not shining. Spire flattish, 

 very little elevated. Protoconch of IJ convex volutions. Whorls 4J, 

 regularly increasing, periphery and base rounded. Suture deep. 

 Aperture oblique, lunate. Peristome thin and sharp, regularly arched. 

 Columella short, vertical, arcuate ; inner lip slightly expanded, and 

 forming a thin callous layer on the parietal wall. Umbilicus moderate, 

 its diam. "7 millim., deep and sub-cylindrical. Diam. maj. 2"7, 

 min. 2-5 ; height 1 "5 mm. 



Hab. — Kenepuru, South Island. 



This species is allied to E. maciilata, Sut., which, however, has 

 much more numerous riblets, about thirty per millim. Type in my 

 collection. 



Endodonta (Charopa) vortex, Murdoch, n.subsp. microrhina. 



Distinguished from the species by the following characters : the 

 shell is somewhat larger, the radial riblets less elevated and slightly 

 closer together, about twenty-two per millim., the interstices with 

 numerous fine microscopic growth-lines and exceedingly fine and dense 

 spiral striae. Colour white or very light horny, without any markings. 

 Protoconch smooth, no spiral lines. Diam. 1-9, height I'l mm. 



Sab. — North Island, near Ormondville ; type, Mount Wellington 

 lava-fields. Hunua Range. JE. vortex was described in these Pro- 

 ceedings, vol. ii, p. 160. Type in my collection. 



Laoma (Phrixgnathus) compressa, n.sp. PI. XI, Fig. 24. 



Shell minute, depressed, perforated, yellowish- white, thin, shining. 

 Sculpture of the post-embryonic whorls consisting of fine growth-lines 

 and microscopic very fine spiral striae, more distinct upon the base. 

 Colour uniformly yellowish-white. Spire low, lightly convex, its 

 height about half that of the aperture. Protoconch convex, smooth. 

 Whorls 4, regularly and slowly increasing, convex ; periphery sub- 

 angled, base convex. Suture simple, impressed. Aperture lunate. 

 Peristome thin and sharp. Columella short, arcuate ; inner lip some- 

 what reflexed above. Perforation rather narrow, quite open, deep, 

 about one-tenth of the greatest diameter. Diam. 1*4, height 1-25 mm. 



Hab. — Birkenhead, near Auckland (A, Suter). Type in my 

 collection. 



Laoma (Phrixgnathus) Trailli, n.sp. PL XI, Fig. 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 

 impressed, 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 



