296 Transactions. 



44. Odostomia (s. str.) marginata, n. sp. Plate XXV, fig. 37. 



Shell small, ovate, white and shining, almost smooth, with 

 a margined suture and angled body-whorl. Sculpture consists 

 of distinct flexuous growth-lines, irregularly spaced, and with 

 much finer incremental stria? between them ; with a magni- 

 fying-power of about thirty diameters distant fine spiral stria- 

 tion can be made out. Colour white, shining, porcellaneous. 

 Spire elevated, conical, about the same length as the last whorl. 

 Protoconch consisting of about two smooth whorls, the nucleus 

 heterostrophe, tilted. Whorls 6, flatly convex, the last angled 

 at the periphery ; base convex. Suture impressed, distinctly 

 margined below. Aperture vertical, pyriform, angled above, 

 rounded and slightly effuse below ; peritreme discontinuous. 

 Outer lip sharp, flatly convex, sharply rounded at the base. 

 Columella with a very distinct tooth just below the junction 

 with the body-whorl, concave below. Umbilicus represented 

 by a distinct chink. Operculum unknown. Altitude, 4 - 5 mm. ; 

 diameter, 2 - 3 mm. 



Type in the Colonial Museum, Wellington. 



Obs. One adult and a few young shells, all dead. From 

 our nearly allied 0. angasi, proxima, and vestalis it may at once 

 be distinguished by the distinct margination of the suture and 

 the angled last whorl. 



45. Eulimella levilirata, n. sp. Plate XXV, fig. 38. 



Shell small, subulate, imperforate, many-whorled. Sculp- 

 ture consisting of microscopic fine close and linear spiral 

 grooves, crossed by very fine unequally spaced growth-lines. 

 Colour white, glossy. Spire long and subulate. Protoconch 

 smooth, with a heterostrophe, minute rounded and lateral 

 nucleus. Whorls 7, slowly and regularly increasing ; sides 

 flatly convex, base rounded. Suture well impressed and dis- 

 tinct. Aperture in our only specimen imperfect, very likely 

 subquadrate, broadly angled above. Outer lip partly broken 

 off, sharp, convex. Inner lip forming a thin layer on the body, 

 more callous on the straight rounded columella ; basal part 

 of peritreme broken off. Altitude, 6 mm. ; diameter, 1*4 mm. 



Type in the Colonial Museum, Wellington. 



Obs. One dead shell only. Distinguished from the other 

 two New Zealand species, deplexa and cozna, by the presence 

 of spiral sculpture. 



46. Pyramidella (Syrnola) tenuiplicata, n. sp. Plate XXV, 



fig. 39. 

 Shell minute, subulate, imperforate, white and porcellaneous, 

 with a long spire and pointed apex. Sculpture consists of some 



