MOLLTJSOA or THE ' CHALLENGBE ' EXPEDITION. 363 



Nassa, Lam. 



1. IV. levukensis, n. sp. 



2. N. psila, n, sp. 



3. N. brychia, n. sp. 



4. N. babylonica, n. sp. 



5. N. agapeta, n. sp. 



6. N. capillaris, n. sp. 



7. iV. ephamilla, n, sp. 



1. Nassa levukensis, n. sp. 



July 29, 1874. Levuka, Fiji. 12 fms. 



^^e?Z. — Thin, rather smooth, browuisli livid, ovate, subfuSiform, 

 scarcely oblique, with a short, subscalar spire, and a small but 

 bluntish apex ; the anterior canal is very shortly but sharply mar- 

 gined, with scarcely any snout. Sculpture. Longitudinals — the 

 earlier whorls are crossed by numerous rather fine straight riblets 

 parted by similar furrows ; these ribs and furrows increase in 

 strength, but not proportionally so, down the spire, and tend to 

 become obsolete on the body- whorl ; the lines of growth are fine, 

 smooth and unequal. Spirals — a strongish furrow below the suture 

 cuts off the top of the ribs as a row of nodules ; the middles of 

 the whorls are scored, especially in the intercostal furrows, with 

 remote impressed lines, which are more or less obsolete ; on the 

 front of the base are 4 to 6 strongish, flat, subimbricated threads : 

 coiling round the base of the pillar is a broad shallow furrow, in 

 which the longitudinal ribs are visible ; below this is a prominent 

 thread, while the point of the pillar is scored by about 4 sharpish 

 threads with broader furrows. Colour livid, with more or less of 

 brown ; the point of the pillar is white, as are two bands, one at 

 the suture and the other above the periphery. Spire short, conical, 

 subscalar. Apex small but blunt, the three smooth, rounded, glo- 

 bose embryonic whorls being somewhat depressed ; they are also 

 markedly smaller than the succeeding regular whorl. Whorls 9, 

 conical, slightly convex, the last a little tumid. Suture impressed 

 and slightly canaliculate. Ifouih oval, pointed, channelled and 

 nicked above, with a short oblique canal in front. Outer lip sin- 

 uated above, straight, and rather contracted to the point of the 

 base, where it is patulous ; it is toothed within, serrated on the 

 anterior edge, right-angled at the canal, the edge of which is 

 sharply mai'gined by the infrabasal thread. Inner lip concave 

 and toothed above, straight and bluntly tubercled on the pillar, 

 the point of which is flanged, and down which the edge of the 

 labial callus projects prominently, leaving a shallow chink behind 

 it. Operculum thin, yellow, oval, triangular, with a slightly ser- 



