SUIER : ON MOLLUSCA FEOM NEW ZEALAND. 259 



Sekpho Matthewsi, n.sp. PI. XI, Fig. 19. 



Shell small, turbinate, perforate, thin and fragile, radially ribbed, 

 not shining. Sculpture consisting of fine, inequidistant, retractive, 

 flexuous radial riblets on the post-nuclear whorls, extending on the 

 base down to the perforation, six to eight per millim. ; all whorls hare 

 fine and dense microscopic spiral striae passing over the riblets, and 

 decussating the fine growth-lines of their interstices. Colour : 

 protoconch light yellowish with arcuate radial fuscous streaks, which 

 are sometimes present on the next volution, but then become obsolete, 

 giving place to a uniform light-brown colour, interrupted only by 

 a whitish band below the suture and a white central disc on the base ; 

 riblets white. Epidermis thin, dull. Spire elevated, conoidal, apex 

 rather blunt, outlines somewhat convex, its height the same as that 

 of the aperture. Protoconch of If convex whorls, the nucleus very 

 little convexly raised. Whorls 4f to 5, regularly increasing, convex ; 

 periphery regularly arched, base rounded. Aperture oblique, lunate. 

 Peristome simple, sharp. Columella short, slightly arcuate ; inner lip 

 lightly callous, reflexed above, and partly covering the distinct narrow 

 perforation ; spreading broadly as a thin shining glaze over the parietal 

 wall. Diam. maj, 7-5, min. 6"7 ; height 6 mm. 



Hab. — Kaitaia, JS'orth Island (Mr. R. H. Matthews). 



The animal being unknown, the generic position is not absolutely 

 certain, but I hope to get some live specimens in the near future. 



jSTamed in honour of Mr. R. H. Matthews, of Kaitaia, the discoverer 

 of this very pretty little shell. Type in my collection. 



Therasia antipoda, H. & J., n.subsp. Chathamensis. 

 PL XI, Fig. 20. 



The following characters distinguish the subspecies from the 

 species : the radial sculpture consists of less prominent striae and 

 plications ; the rufous streaks are narrower, more numerous, and often 

 zigzag-shaped ; the whorls are much more convex, the last more or 

 less angled at the periphery, never sharply keeled ; suture deeper ; 

 aperture roundly oval, the outer lip but slightly angled, and the basal 

 lip more convex. Diam. maj. 7*1, min. 6'5 ; height 4 mm. 



Sab. — Chatham Islands ; type (Captain Hutton). Stewart Island 

 (C. Traill). Type in my collection. 



rLAJIJIULINA COSTULATA, HuttoU, n.Subsp. PARVA. 



Distinguished from the species by the following characters : 

 the shell is smaller, sub-discoidal, and moderately umbilicated ; the 

 sculpture is the same, but the spirals on the protoconch are very faint ; 

 colour and colour-markings very similar, the brown streaks, however, 

 extend usually over the base ; the spire is very little raised ; the 

 umbilicus is moderate, deep, its diameter being "6 mm. Diam. maj. 

 2-9, min. 2-4 ; height TS mm. 



Sab. — Henderson, near Auckland, in native bush amongst mould 

 (H. S.). Type in my collection. 



