Gnltij Marine Laboraton/^ «SV. Anth-eica. 143 



usual, then a p.ij) occurs, after which the distal finely serrated 

 \»iii<; tapers to a slender point. These bristles are more 

 minute than any hitherto examined. 



Xorway. 

 These have large l)ranchiie, no operenla, and the tij)s of 

 the Hhiments are comparatively short, not expanded, whilst 

 the piniue ar*' nuincrous. No sperms were seen, but (jva 

 o'curred in the anterior region of the abdomen. There 

 wer.' seven pairs of thoracic bristles. Il'-re then was a 

 variation from the form described by Sars which had two 

 operenla. The structure of the collar-bristles entirely agrees 

 with that of the St. Andrews examples. 



Nufilcs. (^Saltnacina ccdificatrix, auct.) 

 The comparatively lar^e size of these examph s and the 

 }.'rcat development of the branchiie, their glandular swellings 

 jilong the filaments, and the large ^^ize of the saus;igc-likc 

 tips, as well as the common occurrence of nine pairs of 

 anterior bristle-bundles make them conspicuous. The pinnae 

 also take on the tendency to increase at the tips, e-pecially 

 the distal pinnie, yet the.sc pinnie arc not so long as in 

 c. rtain forms from the North Sia, also devoid of an oper- 

 ctdum. The development of the axis or filament of each 

 branchia is in contrast with the smaller j)arts in the northern 

 sea-x, the glands of the filaments being smaller. The points 

 or main fangs of the minute hooks appear to be directed 

 forward — both in the anterior and the posterior regions. 

 So far as can be seen, the s|)erms occur behind the bare 

 segments of the anterior part of the posterior region, and in 

 one with embryos they seem to pass backward, some being 

 present at each side of the tail. In this example (with 

 embryos and ova) the tips of the branchiaB showed rather less 

 than the usual enlargements. The granular masses at the 

 sides of the tail, however, may be sperms. Yet they 

 resemble the granules in front. In thuse with advanced 

 embryos most of the sperms appear to be shed. 



The collar-bristles agree in structure with those from 

 Plymoutli and the north, having a basal division of the wing 

 with numerous serrations, a gap, and a tapering dis'al 

 region with a minutely serrated edge. The bristle h:is the 

 same curvature at the end of the sha't. Ten points at least 

 ap|)ear in a favourable view of the basal web of the collar- 

 bristles and the others agree with those of the northern typts. 



Dongonab, Red Sea. 2.1:2. 1U15. 

 The vermidom is of the open pattern, so that aeration 



