62 Prof. M'Intosh's Notes from the 



bristles with tapering tips and well-marked wings which are 

 obliquely striated and probably minutely serrated at the 

 edges, though this was not clearly seen in the spirit-prepa- 

 rations. The tips are slightly curved backward, and the 

 shafts faintly striated. The tips of a shorter series, pro- 

 bably for replacement, project from the edge of the setigerous 

 process. The succeeding bristles of the anterior region are 

 arranged in two series — an upper with long straight shafts 

 and shorter more finely tapered tips (1^1. IV. fig. ll), with 

 proportionally broader wings than in the first series, the 

 backward curvature occurring beyond the commencement 

 of the wiugs, and a lower with spatulate tips terminated 

 by a median filament (PI. III. fig. 8). In the developing 

 bristle various degrees of enlargement of the spatulate tips 

 are observed, and the wings are more or less longitudinally 

 striated. These bristles form a group moved by distinct 

 muscles, as might be anticipated from their functions. 

 The posterior bristles are longer and more slender, the 

 shafts, however, being comparatively short, whilst the tips 

 are of great length and finely tapered, with but slight curva- 

 ture. The wings are so narrow as to be almost indistin- 

 guishable, though in the developing bristles with a portion 

 of the tip protruding they are more easily recognized. 

 These posterior tufts do not show a shorter series. 



The anterior hooks (PL III. figs. 5, 6) have long curved 

 shafts, which dilate from the base (proximal end) to the 

 shoulder, where a slight constriction marks the commence- 

 ment of the short neck, which again expands a little distally 

 as it runs into the main fang in front and the rounded 

 crown posteriorly. When inverted these organs simulate 

 the human foot and leg. The main fang leaves the neck at 

 rather more than a right angle, but the crown is quite flat 

 except at the rounded posterior " keel." Numerous small 

 teeth occur on the crown behind the main fang. The 

 posterior hooks (PI. III. fig. 7) lean to the type of Clione 

 reayi, though quite different, for the shaft ends abruptly 

 after only a slight curvature, so that no proper prow is 

 formed and the neck is little, differentiated. The main 

 fang leaves the neck at an angle of 45°, the posterior 

 outline curves forward to the somewhat high crown which 

 has numerous minute teeth above the great fang. 



Reproduction. A male had nearly ripe sperms in August. 

 Tube. The tube is a smoothly rounded firm structure of mud, 

 Avhich coats the internal chitinous lining. It is friable. 



A Choae resembling C. fauveli comes from Godhavn 

 Harbour, Disco, where it was dredged by H.M.S. 'Valorous,' 



