408 THE VOYAGE OF H.M.S. CHALLENGER. 



2. Cassis (JBezoardica) wyvillei, n. sp. (PI. XIV. fig. 13). 



Station 204a. November 2, 1874. Lat. 12° 43' S., long. 122° 9' E. Philippines. 

 100 to 115 fathom?. Green mud. 



Shell. — Large, globosely ovate, ventricose, thin, unvarixed, tubercled, almost smooth, 

 Avith a smooth reverted outer lip, a twisted pillar, an almost wholly covered and shallow 

 umbilicus, a raised spire, and an impressed suture ; it is of a pale ruddy fawn colour, under a 

 thin glue-like epidermis. Sculpture : Longitudinals — there are obsolete rounded lines of 

 growth, with here and there, on the last whorl, a strong sharp scratch, but no approach to 

 a varix anywhere ; on the upper whorls there are distant rounded threads. Spirals — there 

 are on the last whorl four remote rows of distant tubercles, on the two previous whorls 

 only two rows are seen ; the first row forms a prominent shoulder some way below the 

 suture ; its tubercles are large, rounded, and sharp, and are connected somewhat feebly by 

 a small rounded thread ; the second row lies immediately above the suture, and consists 

 of much smaller, closer set, elongated, blunt, and scarcely raised tubercles ; the third is 

 about ecjually remote from the second, and the fourth from the third ; in these the tubercles 

 are increasingly feeble, and they can just barely be traced on the body near the mouth : 

 on the last half of the body-whorl all these tubercles entirely disappear, only an exceed- 

 ingly feeble keel about half-an-inch below the suture is for a little way recognisable ; here 

 the surface is almost quite smooth, with very obsolete remote threads, which become slightly 

 more distinct on the base ; on the earlier regular whorls these threads are sharp, and, 

 decussated by the longitudinals, form a harsh reticulated surface ; at the point of the base 

 there is an open oblique furrow bordered in front by the reverted lip of the anterior sinus, 

 and also by the sharp thread which is the old scar of the sinus-edge. Colour : there is a 

 membranaceous, smooth, but not glossy epidermis, beneath which the shell is of a pale ruddy 

 fawn colour. Spire rather high and subscalar. Apex small, prominent, almost sharp ; 

 it consists of 4 quite smooth, globose, rounded, small embryonic whorls. Wliorls: besides 

 those of the embryo there are nearly 7 regular whorls ; they are of very regular increase, 

 the last is somewhat ventricose, with a rounded and little produced base. Suture slightly 

 impressed, scarcely oblique. Mouth rather large, elongately pear-shaped, white, faintly 

 tinted in the throat. Outer Up smooth, white, flatly reverted ; at its insertion it just 

 includes the second row of tubercles ; on the base it is patulous ; the sinus in front of the 

 pillar is open, oblique, not very large, and has a reverted edge. Inner lip : across the 

 body spreads high and very wide a thin glaze thickened into a thin short bridge across 

 the horizontal umbilicus, and then running straight down the pillar, which is twisted, has 

 a very strong oblique fold in the middle, and below this 3 feeble folds which are quite 

 external and short ; lower still is the sharp, strong, very prominent and much twisted 

 pillar-edge. H. 4 in. B. 2'6. Mouth, length 2*8, breadth 1'9. 



