Murdoch. — Additions to Marine Mollusca of N.Z. 221 



Drillia lyallensis, n. sp. Fig. 7. 



Shell small, fusiform, rather solid. Colour light or dark 

 brownish-red, or somewhat purple (slightly beach-worn speci- 

 mens). Whorls 6-6 J, rather flattened, spire with a lightly turrited 

 appearance, apex smooth ; last whorl much longer than the spire, 

 with eleven or twelve low, strong, rounded and slightly oblique 

 ribs, rather wider than the interspaces, obsolete on the anterior 

 half and usually on approaching the outer lip. Spiral sculpture 

 consists of minute stria?, erased upon the ribs, a few at the 

 anterior end stronger, and frequently several rough irregular 

 ridges the remains of the old beaks. Sutures impressed, some- 

 what deep. Aperture narrow. Outer lip slightly thickened, 

 the posterior sinus near to the suture and moderately deep. 

 Columella lightly curved, not heavily callused ; the canal short, 

 broad, and slightly twisted. Length, 12 mm. ; breadth, 4*56 mm. 



Type in the Colonial Museum. 



Hob. Lyall Bay (Mr. C. Freyberg). 



This species is not uncommon in shell sand, but in the 

 majority of specimens the finer sculpture is totally erased. 

 Most examples show prominent scars, flexures repaired during 

 the life of the animal. Of the five specimens before me, three 

 are pierced by a carnivorous mollusc, and, strange as it may 

 appear, each in exactly the same spot — a little above and to the 

 left of the outer lip. In sculpture the species most resembles 

 Clathurella sinclairi, Smith. 



Cerithiopsis sarissa, n. sp. Figs. 8, 9. 



Shell small, narrow, and tapering to a slender point, adorned 

 with spiral and slightly weaker longitudinal riblets which form 

 gemmules on the lines of intersection, base smooth. Colour 

 light or dark brown, somewhat shining ; the sutures of the 

 anterior whorls, fourth spiral on the last, and base dark-purplish. 

 Whorls 11-12, sutures deep. Apical whorls without sculpture ; 

 the succeeding with three spiral and numerous slightly oblique 

 longitudinal riblets forming rows of gemmules. On the anterior 

 whorls the sutures are margined with a minute beaded riblet; 

 this gradually strengthens, and on the last whorl forms a fourth 

 spiral, with the beading less marked than on the rows immediately 

 above ; beneath this a shallow groove, thence gently curved 

 to the columella, and curving obliquely around the latter is a 

 minute ridge which terminates at the canal. Of the three spiral 

 rows of gemmules the two anterior are the largest, and about 

 equal to the interspaces. The gemmules, of which on the last 

 whorl there are seventeen to twenty per row, are somewhat 

 oval, shining and variously coloured, light-brown, pale-chestnut, 



