538 Prof. M'lntosh's Notes from tie 



becoming more elongated posteriorly (PL XII. a. fig. 5), a 

 typical foot there showing about five ringed hooks with a slight 

 curvature of the shaft and ending in a point, generally 

 abraded, and witii only a trace of a curvature near the tip. 

 They would thus act as lever-like spines, whilst the anterior 

 crotchets are more fitted for clinging. 



The distinctions between Brada and Stylarioides do not 

 rest on the absence of the frontal bristles as De Quatrefages 

 states, for the first and second pairs of dorsal bristles, though 

 short, are in Brada fairly conspicuous. Moreover, one 

 section of the genus, viz. that represented by Brada villosa, 

 H. liathke, leans cio&ely to Sti/Iarioides, especially that group 

 with more or less straight ventral bristles, yet they are 

 distinguished by the papillae between the fourth and fifth 

 bristled segments in Brada — even in the elongated type 

 with 45 segments. The setigerous process for the ventral 

 bristles is more distinct in Brada, and may show a circlet of 

 papillae at its base. The palpi and numerous branchiae 

 characterise Brada, as well as Stylarioides. In Brada the 

 ovaries form dense clusters in the sixth, seventh, and eighth 

 bristled segments and behind the papillaj. 



A variety of Brada villosa, PI. Eathke, was dredged in the 

 ' Porcupine ' Expedition of 1870 at Station 8 on the Channel 

 Slope in 257 fathoms, amidst a northern fauna, and it was 

 also dredged in the ' Knight Errant' on the 17th August, 1880^ 

 at a depth of 580 fathoms at Station 8. It measures about 

 2 inches in length, and is distinguished by its hirsute 

 sandy aspect and the shortness and delicacy of its bristles. 

 The anterior end is bluntly rounded and the feeble 

 development of the frontal bristles is, for instance, in con- 

 trast with those of Stylarioides plumosa and indicates a 

 difference in surroundings, the present form probably in- 

 habiting soft mud in deep water. The anterior pit has a 

 broad arch superiorly, the margin being papillose, whilst the 

 posterior lip is deeply sinuous ventrally, the whole forming 

 a large opening with a broad projecting rim ventrally. In 

 this aperture lie the two crenate and grooved palpi and above 

 them the slender branchiae. The body is fusiform, tapered 

 anteriorly and more distinctly posteriorly, where it ends in a 

 bluntly conical tail with the anus in the centre. Three 

 diminishing smooth rings occur behind the last segment 

 bearing bristles. The dorsum is rough with long papillas and 

 sand-grains, which on the ventral surface are smaller, thus 

 rendering the enlarged anterior region smoother, and the same 

 may be said of the posterior half. Both offer a contrast to 



