IGO ProF. M'liitosh's Notes from the 



striated distal region with the teetli. The opacity behind 

 the shoukler shows faint strife. The great fang leaves the 

 neck at considerably less than a right angle, and from the 

 neck, immediately below its base, is a tuft of gular bristles, 

 which pass to the tip and bend upward on each side of the 

 fang. The crown is now high^ and there are seven teeth 

 above the great fang. The lower and the central regions of 

 the neck are strongly striated ^. 



The tube is fragile, the inner layer being composed of a 

 thin layer of secretion to which sand-grains, minute frag- 

 ments of shells, and Foraminifera are attached externally. 



A very similar form Avas dredged by Dr. Gwyn Jeffreys in 

 90 fathoms off North Unst, on July 15, 1868. If the 

 two fragments in the bottle belong to the same specimen, 

 and they so far agree^ the number of the segments would 

 thus be twenty-three — a larger number than usual in the 

 group. The funnel has fourteen cirri, that over the ventral 

 ridge being only a little longer and broader than the others. 

 As they are set on the rim at intervals their arrangement 

 is characteristic. The hooks and bristles seem to correspond 

 with the foregoing. A high power does not show fine spikes 

 in the delicate hair-like tips, but the preparation had long been 

 preserved. The tube in this case is composed of somewhat 

 coarse fragments of shells, fragments of a tube of Ditrypa, 

 and sand-grains attached to the secretion. 



Arwidsson records two mutilated examples of PraxilleUa 

 affinis, Sars, the ninth species, from the south coast of 

 Ireland, Stat. R 31 (8, p. 127), or six miles S.E. of Mine 

 Head, 53 m. One fragment consisted of the third to eightli 

 setigerous segments, and the other had from the third to 

 the seventeenth. "Besides there is a posterior extremity 

 possibly belonging to one of the foregoing. Amongst other 

 things are found the specially developed setae on the tenth 

 and eleventh setigerous segments. ^^ [Arwidsson.) f 



The tenth British IMaldanid is PraxilleUa gracilis, Sars, 

 which was dredged in 100 fathoms in St. Magnus Bay, 

 Shetland, by Dr. Gwyn Jeffreys. 



The head has the cephalic plate somewhat more oblique 

 than in P. pratemissa, so that the anterior border is more 

 acute in lateral view, especially as the filament and anterior 

 process thus appear as a continuous narrow appendix. In 



* Arwidsson also describes a Leiochone, to wliicli lie gives no name, 

 in Proc. R. Irish Acad. vol. xxix. p. 214 (1911). 



t Proceed. fJoy. Irish Acad. vol. xxix. p. 215 (1911). 



