MOLLUSCA FROM THREE HUNDRED FATHOMS HEDLEY. 217 



Odosfoiiiia (OMiscxs) nifidnia, Watson, Chall. Rep., ZooL, xv., 



1886, p. 487. 



"This species," remarks Dr. AV. H. Dall,^ "is very widely dis- 

 tributed, both in area and depth." Its range extends from Japan 

 to the Mediterranean and West Indies, but it has not been 

 recorded before fi-om the .Southern Hemisphere. In our collection 

 it is represented b}- a single specimen 7 mm. long, taken in two 

 hundred and fifty fathoms. 



RiSSOA FILOCINCTA, sp. nOV. 



(Plate xxxvii., fig. 2). 



Shell small, opaque and rather solid, broadly ovate, narrowly 

 perforate. Whorls five, of which one and a half compose the 

 protoconch, ventricose, the earlier whorls angled above, the last 

 rounded, rapidly increasing, not descending at the aperture, 

 sharply constricted at the sutures. Sculpture : protoconch 

 smooth, in adult shell the radials first predominate, gradually 

 grow denser and finer and ai'e at last exceeded by the spirals. 

 The body whorl carries twelve sharp, erect, wide spaced spirals, 

 of which the upper are latticed by forty-two radial riblets pro- 

 ceeding from the suture and fading at the periphery. Twenty 

 stronger radial ribs, whose interstices are traversed by five spirals, 

 cross the penultimate whorl. The remaining whorl and a half 

 has twenty-one coarse, wide set radials, with a spiral thread above 

 and below. Aperture perpendicular ovate, fortified by a thick 

 -outstanding varix. Length 3 mm.; breadth 1-7 mm. 



Several specimens from both hauls. 



BiTTIUM FUSCOCAPITULUM, S^). UOV, 



(Plate xxxviii., figs. 10 and 11). 



Shell rather large, thin, broad at the base, with straight sides, 

 tapering to a sharp point, angled and contracted at the base. 

 Colour pale purple, granules white, protoconch chocolate brown. 

 The individual drawn has fifteen whorls in a length of eleven mm., 

 but a larger decapitated example is thirteen and a half mm. for 



< Dall— Bull. Mus. Comp. Zool., xviii., 1889, p. 334. 



