MOLLUSCA OF THE ' CHALLENGER ' EXPEDITIOX. 331 



This is au extremely peculiar form of great beauty. It is 

 higlier and narrower than the measurements would suggest, the 

 outthrow of tlie outer lip being great, but of short continuance. 

 It lias a strong general resemblance to Ancillarla glahrata, L., or 

 A. Vernedei, Sow., or other smaller species of that form, of which, it 

 simulates the subperipheral band. In Volnta pallida, G-ray, some 

 of the peculiar features of this species — such as the sutural sinus, 

 the enamelled spire, and the outthrow of the outer lip at its lower 

 corner — are found, though in a much feebler form. 



The swelling on the pillar which is characteristic of the Volutes, 

 and is really the scar of the old columellar sinus, is in this species 

 quite absent in front, but is just recognizable on the back of the 

 shell in the flexure of the lines of growth. 



Ctmbtola, Sioains. 



Ctmbiola lute a, n. sp. 



St. 166. June 23, 1874. Lat. 38° 52' S., long. 169° 20' E. 

 About 200 miles west of Cape Earewell, New Zealand. 275 fms. 

 Globigerina-ooze. Bottom temperature 50°"8. 



Shell. Fusiform, strongish, pale buff, with a high blunt 

 spire, largish mouth, slightly reverted oiiter lip, and four teeth on 

 the pillar. Sculpture. Longitudinals — On the upper whods there 

 are a few slight narrow ribs, which are almost obsolete on the 

 later whorls ; the lines of growth are many and hair-like. Spirals 

 quite obsolete. The columellar swelling in front is very small 

 and slight. Colour ashy white over pale buff, entirely with- 

 out gloss; the outer lip and the body-glaze are rich buff, 

 paler inwards. Spire high, a little irregularly bent, subscalar. 

 Ajpex blunt, mamillary, impressed. Whorls 6| : they are convex, 

 above contracted into the suture, perpendicular below ; after the 

 first three they increase rapidly ; the last is slightly ventricose, 

 long, attenuated in front. Suture oblique, slightly impressed, 

 irregular. Mouth long, but not wide, oblique, with its two sides 

 nearly parallel, bluntly pointed above, ending below in a broad, 

 shallow, slightly emarginated, jninutely bordered canal. Obiter 

 lip patulous, thin, but expanded and rounded on the edge ; it rises 

 on the penultimate whoid at its junction, and is here drawn back 

 into a slight sinus with a very reverted edge. Inner lip spreads 

 widely as a thin glaze on the body ; above it is scarcely convex, 

 hardly concave in the middle, perpendicular below, where are four, 

 not strong, equal, concealed, pale-coloured, very oblique teeth ; 



