594 BEV. B. BOOG WATSON ON THE 



MoLLUscA OF H.M.S. ' Challengee ' Expedition.— Part XV. 

 By the Eev. Eobeet Booa Watson, B.A., F.E.S.E., F.L.S. 



[Published by permission of the Lords Commissioners of the Treasury.] 



[Eead June 15, 1882.] 



Fam. Ranellacea. I Fam. Scalariid^. 



MURICID^. I SOLARIID^. 



In the following group the very peculiar form of the Nasmria led 

 to its being misplaced, and so overlooked at the right time. The 

 Murices are few in number, and, though not without interest, are 

 poorly represented in the specimens which have been found. The 

 Scalarice, though beautiful as usual, are all small. A new species 

 of the genus Crossea is an acquisition. The only Solarium is 

 small. 



Eam. E,ANELLACEA, Troscliel. 



Nassabia, Link. 



Nassabia kamptla, n. sp. (KUfxiriXos, bent.) 



St. 164 a. June 13, 1874. Lat. 34° 13' S., long. 151° 88' W. 

 Off Sydney. 410 fms. Grey ooze. 



Shell. — Thinnish, porcellaneous, white, ribbed, banded, and 

 tubercled ; with a high spire, a blunt rounded apex, rounded 

 whorls, and a contracted rounded base produced into a very one- 

 sided, narrow, sinistrally bent, and reverted snout. Sculpture. 

 Longitudinals —there are on each whorl from 13 to 15 rather 

 narrow ribs, which are feeble in the sutures and die out on the 

 base ; they are small, sharp, close-set, and regular on the first 

 ordinary whorl ; afterwards they become irregular and distant, 

 and on the body someAvhat obsolete ; at every two thirds of a 

 whorl one of these ribs becomes prominent as a varix, with the 

 old mouth-edge in front : the whole surface is roughened with 

 rather harsh lines of growth. Spirals — there are several distant 

 bands, sharpish on the upper whorls, broad and feebly raised on 

 the last ; these rise into low rounded tubercles in crossing the 

 ribs ; one of them has a slight tendency to form an angulated 

 shoulder some way bdow the suture; they extend to the base, 

 but pass over into threads on the snout : the whole surface is 

 further scored by fine, close-set, rounded threads ; these are 

 fretted harshly, but the intervening furrows most delicately and 

 starply by the lines of growth. Colour porcellaneous white 



