Gatly Marine Laboratory^ St. Andrews. 51 



gren's A. prohoscidea, was met with in Gaspe Bay and other 

 Localities in 30 fathoms, and the ulnqiiitous Trichobranchus 

 glacialis, .Malingren, off Port Hood, and Terebellides sti'oeini, 

 iSars, in 100 to 212 fathoms off AuticosLi, ott" Pugwash, 

 Nova Scotia, and other places. 



Several examples of Lanussa nordenskioldi. Malragren, 

 occurred off Ca])e George, Nova Scotia, in 1873, and a frag- 

 ment at No. 6 the previous year. Those from Cape George 

 were in thick and rather long tuloes of brownish clayey mud, 

 which presented a smooth inner lining, but no perceptible 

 membrane, and as they had not been specially attended to after 

 capture had decayed. The cephalic lobe has scarcely a trace 

 of a collar dorsally and is small, its inferior lip forming an 

 arch over the mouth, f'rom its surface a series of grooved 

 tentacles arise. Neither eyes nor branchiae are present. 

 The body is elongated, but, as no complete example has been 

 found,thenumberofsegmcntsisunkno\vn, probably from forty 

 to seventy. It is enlarged anteriorly and tapered posteriorly 

 to a terminal crenate vent. The dorsal surface is rounded 

 and with minutely tuherculated bands in front ; whilst the 

 ventral surface, also flattened in the region of the shields in 

 front, is grooved posteriorly. The first three bands of 

 tubercles are narrower than the svicceeding, and give a 

 character to this region of the dorsum. A deep groove runs 

 along each side of the body above the ventral longitudinal 

 muscles behind the anterior region. 



Fifteen pairs of setigerous processes occur anteriorly, viz. 

 from the fourth to tlie nineteenth. They are conical when 

 viewed from the dorsum, the tips being flattened and 

 obliquely truncated, so that the dorsal edge projects most. 

 They bear long pale golden bristles, the tips being curved 

 backward, and they occur in two series, a longer and 

 shorter, the stronger and longer of the former being dorsal, 

 the shorter being ventral. Each bristle (PI. II. fig. 8) 

 has a translucent, faintly striated, flatttned shaft, the 

 narrowed base of which is often enlarged at the end. The free 

 portion is slightly narrowed from the surface o£ the skin to 

 the origm of the very narrow wings, and then the tip is 

 tapered to a fine translucent hair-like point. The shorter 

 forms have only the winged tip free, and they probably indi- 

 cate a reserve-series. 



The first row of hooks is opposite the second bristle- 

 bundle, and the others occupy a similar position throughout 

 the bristled region, being in a single row to the seventh and 

 in a double row thereafter to the fourteenth. Behind the 



4* 



