370 REV. E. BOOG WATSON ON THE 



to belong to one species, and that not N. incrassata. Compared 

 witli N. proxima this species differs in being more contracted at 

 the suture ; tlie whorls are rounder and less flat, and lack the 

 peculiar infrasutural contraction and flattening and the solitary- 

 strong remote thread which lies there ; the spirals are stronger 

 and more regular, while that species is nearly smooth ; the em- 

 bryonic apex is larger, its whorls being in that other species more 

 minute, while they are at the same time depressed or immersed. 

 The longitudinal ribs, too, in N. proxima are fewer and weaker 

 the mouth is larger, more oval, more produced at the lower outer 

 corner; the outer lip is thinner, with fewer, narrower, less regular 

 teeth ; the inner lip is much more widely spread out on the body ; 

 the pillar, too, is shorter. It has resemblances to N. sanctce helence, 

 A. Ad., to N. cinetilla, Grould, to AT. coccinella, Lam., to AT. an- 

 tillarum, d'Orb., to AT. amhigua, Pult.,to N. pygmcea, Lam., to AT. 

 nucleolus, Phil., and to N. acuta, Say, with all of which this spe- 

 cies has been very carefully and fully compared ; but it is need- 

 less to detail the points o£ distinction. As regards N. incrassata, 

 Miiller, that very variable species has a very constant stain in the 

 canal; seen from above, the whole canal and pillar are broader; 

 the longitudinal ribs are more regular, and these, like the spirals, 

 are stronger, being both rounder and higher ; and they run flex- 

 uously indeed, but with a distinct trend from left to right, while 

 in the ' Challenger ' species the trend is from right to left. In 

 Miiller's species the apical whorls are more rounded, and are 

 parted from each other by a deeper suture ; the labial pad, too, is 

 undefined. 



7. Nassa ephamilla, n. sp. (e<pafxi\\os, a match for another, 

 viz. A^. Woodwardi, Porb.) 



St. 169. : July 10, 1874. Lat. 37° 34' S., long. 179° 22' E. 

 N.E. from New Zealand. 700 fms. G-rey ooze. Bottom tem- 

 perature 40^. 



Shell. — Eather small, thin, chalkily porcellaneous, ovate, with a 

 shortish scalar spire, a rounded apex, a marginated suture, whorls 

 rounded and beset with small prickles, a tumid base and a very 

 short pillar. Sculpture. Longitudinals — there are on each whorl 

 about 20 narrow feeble ribs, which do not extend to the upper 

 whorl and die out on the base ; the lines of growth are fine, 

 flexuous, and close-set. Spirals — there are on the penultimate 

 whorl four broadish but very slightly raised threads ; in crossing 

 the longitudinal riblets these rise into small prickles, or pointed 



