340 GASTROPODA. [Pectinibranchia. 



11. Odostomia Murdochi, n. nov. Plate 16, fig. 24. 



Odostomia proximo, Murdoch, T.N.Z.I., xxxvii, 1904 (1905), 226, pi. 8, f. 19 ; 

 not of de Folin, 1872. 



Shell small, elongated, rather fragile, smooth. Sculpture con- 

 sisting of irregular minute growth-periods, in places slightly pro- 

 nounced, usually more marked on the spire ; these are crossed by 

 minute spiral striae and scratches, very irregularly spaced, in some 

 almost absent except for a few on the anterior half of the last whorl. 

 Colour white or lightly yellowish, polished. Spire high, conical, not 

 quite twice the height of the aperture ; outlines straight. Protoconch 

 heterostrophe, minute, polished, the nucleus lateral. Whorls 6, some- 

 what rounded ; base convex. Suture deep, not channelled, very simi- 

 lar to that of 0. hyphala ; margined below by a narrow smooth band. 

 Aperture small, ovate, oblique, angled above, slightly effuse below. 

 Columella vertical, slightly arcuate. Inner lip slightly reflected, and 

 spreading over the parietal wall ; base narrowly perforate. Oper- 

 culum unknown. 



Diameter, 1-8 mm. ; height, 3-9 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hob. Whangaroa Harbour, type (C. Traill) ; Banks Peninsula 

 (Iredale). 



12. Odostomia pudica, Suter, 1908. Plate 17, fig. 1. 



Odostomia pudica, Suter, T.N.Z.I., xl, 1907 (1908), 366, pi. 29, f. 14. 



Shell small, elongate, imperforate, smooth, semitransparent, 

 polished. There is no sculpture, except fine straight growth-lines. 

 Colour white. Spire subulate, twice the height of the aperture ; 

 outlines straight. Protoconch of 1 small and smooth whorl, hetero- 

 strophe, oblique. Whorls 1, regularly increasing, flat, the lower ones 

 angularly contracted above the suture, the angle continued on the 

 periphery of the body-whorl ; base flat. Suture canaliculate. Aper- 

 ture oblique, pyriform, angled above and narrowly produced below. 

 Outer lip flatly rounded, thin and sharp. Columella vertical, slightly 

 concave, with a low oblique plait above. Inner lip rather broadly 

 expanded, spreading thinly over the parietal wall. Operculum un- 

 known. 



Diameter, 2-4 mm. ; height, 5-6 mm. 



Animal unknown. 



Type in my collection. 



// a . Bay of Islands, type (J. C. Anderson). 



Remark. This species is evidently near 0. hi/phala, but it is shorter 

 by the same number of whorls, and slightly more slender ; the whorls 

 are angled above the suture, and the last whorl is slightly angled at 

 the periphery ; the suture is channelled, and the whorls not projecting 

 below it. 



