464 REV. R. BOOG WATSON OX THE 



the canal ; its edge-line is very straight and scarcely prominent, 

 but has a high shoulder above, between which and the body 

 lies the deepisb, rounded, and open-mouthed sinus. Inner Up 

 very thin and narrow, and dying out very early on the scarcely 

 oblique, twisted, sharp pillar-edge ; its line across the body is 

 very short and convex, but is very concave at its junction 

 with the long, scarcely oblique pillar. H. 022. B. O'l. Pen- 

 ultimate whorl, height 0*04. Mouth, height 013, breadth 

 0-04. 



This is like P. (Z>.) pudens, but differs markedly in its more 

 angular outlines and square pinched-out suout. 



56. Pleurotoma (Deerancia) streptophora, n. sp. (Wpe- 

 7irTo<p6pus, necklace-wearing.) 



North Atlantic. April or May 1873. (Station not entered.) 

 Over 1000 fms. 



Shell. — White, strong, porcellaneous, stumpy, with a very short 

 body-whorl, a double necklace of tubercles below the suture, a 

 rather high, small-tipped, buff-pointed spire, a rounded base, 

 small, broadish, reverted snout, and a twisted pillar. Sculpture. 

 Longitudinals — there are about 12 narrow ridge-shaped ribs on 

 each whorl : they originate below the sinus-area in conical-shaped 

 little tubercles, and die out at the point of the base ; they are 

 parted by shallow rounded furrows of about three times their 

 breadth. The lines of growth, which are pretty strong, cover 

 the wdiole surface. Spirals — close below the suture is a row 

 of small, rather coarse, and not quite regular-rounded tubercles, 

 about 24-26 in number: these form an angulated ring as a sub- 

 sutural margination ; adjacent to them is the row of more promi- 

 nent costal conical-shaped tubercles. The body of the whorl 

 below these is feebly striate. Toward the end of the base is a 

 sharpish furrow succeeded by a broadish flat band, below which 

 on the extreme point of the base is a series of 4 sharp narrow 

 threads and furrows, followed by about as many more, smaller and 

 more crowded on the snout. Colour porcellaneous white, glossy, 

 with a buff tip. Spire long relatively to the shell, shortly scalar, 

 convexly conical. Apex: the extreme tip is broken, but had evi- 

 dently been very small ; two whorls remain, rounded, high, 

 conical, parted by a distinct suture, buff-coloured, minutely 

 straight-barred above and reticulated below, as in the type. 



