12 Prof. M'Intosli's Notes from the 



anterior process is a tuft of translucent bristlc-likc fibres, 

 probably causod by ru|)ture. The free extremity oi" tbe 

 elongated anterior process presents an irregular edge from 

 low papilK-e, but wlietbcr it rcjjresents an introvert can only 

 be coujeetured. At its base is an elongated and apparently 

 tubular structure, •svbich may have issued from the body 

 at the bristle-like fibres. In certain views (PI. III. fig. 11) 

 the basal region of the long anterior process is asymmetrical, 

 probably when seen laterally. No fold or break occurs in 

 the outline as the process leaves the body, and its sides are 

 perfectly smooth. The widest part is at the base, as shown 

 in the figure ; it then is nearly cylindrical for some distance, 

 and again slightly widens as it approaches the bulbous end, 

 which in the position occupied in the figure is not quite 

 symmetrical. So far as observed, only longitudinal muscular 

 fibres are present in the process, and the cuticle must be 

 extremely thin as there is no sign of it laterally. In the 

 centre of the process is a granular tube occupying more than 

 half its diameter. 



The body is invested by a tough cuticle, with papillas here 

 and there and the group already mentioned at the posterior 

 end (PI, II. fig. 12). The circular fibres beneath are fairly 

 developed throughout and the longitudinal layer is powerful. 

 Enclosed in the body-cavity were many ova of various sizes, 

 the smallest presenting the appearance of naked granular 

 cells with a large nucleus and nucleolus, the larger having a 

 tough, apparently chitinous capsule. The bristle-like fibres 

 of the anterior end seem to have been due to rupture and 

 the spreading out of the stiff" tapering muscular fibres. 



2. Recent Additions to the British Marine Polychceta 

 (continued). 



In 1908* it was stated that no member of the Alciopidfc 

 had yet l)een met witli in British waters, but there was no 

 reason why such should not be found, e.f/., " oft' the southern 

 shores of England and the West Coast of Ireland." Tlie 

 skill and perseverance of those on board the Irish Fisheries' 

 ship ' Ilelga,' indeed, shortly afterwards added no less than 

 five species to the British Fauna from the surface of the 

 deep water oft" the West Coast of Ireland. It was Grecf 

 who first in modern times brought the group into notice, 

 and he was followed by Ilering. Both divided the Aleiopidse 

 into two main groups, tiie former usijig the head, feet, 

 bristles, and proboscis as the leading features of distinction, 



* ' Monograph,' vol. ii. i)art i. p. 1 12. 



