Galty Marine Lahoratory^ St. Andrews. 103 



Canadian forms they are nearly half the length of the body 

 in the preparations. 



Body somewiiat clavate in outline, though a slight narrow- 

 ing occurs anteriorly I'roni the eighth foot forward, and 

 beliind this it diminisiies to the tail, which in one presented 

 a thick short cirrus on one side. The dorsum is smoothly 

 rounded throughout, whilst the ventral surface is marked 

 from the mouth to tlie tenth bri>tled segment by a thickened 

 glanduhir layer in each segment. Then a groove appears 

 in the middle line, and is continued to the lip of the tail. 

 In a large example the vent presented a notch dorsally and 

 a crenate edge beneath, and in a perfect Canadian example 

 in a tube a short cirrus occurred on each side. Malmgren's 

 specimens had been imperfect. 



External to the branciiise is the small first setigcrous 

 process, which bears a tuft of bristles. This and the next 

 two are rather dorsal than lateral, but they soon become 

 lateral and project from the region as long processes sloping 

 outward and backward. 



Each bristle-tuft has a longer and a shorter stnics of 

 translucent bristles, with a slightly curved tip furnished with 

 somewhat narrow wings. The shaft is minutely striated 

 longitudinally, and widens a little as it approaches the tip. 



The hooks have a somewhat triangular outline fr.)m the 

 breadth of the crown, which is slightly sinuous. The pos- 

 terior outline curves to the rounded prow, which is carried 

 to the line of the teeth. The first tooth is as large as the 

 second, and the two following are similar, the last being 

 slightly broader at the base from the curve of the gulf 

 between it and the prow. The posterior hooks are smaller, 

 but they have the same form and structure. Moreover, 

 the papillse or lamellae on which they occur are the only 

 processes posteriorly, and are twelve or thirteen in number. 



The tube is not mentioned by j\Ialmgien, but is composed 

 of a lining of tough secretion with a i'tiw sand-grains and 

 free sheds of mucus, which give it the aspect of being coated 

 with minute algte. 



The fifth representative is Am age auricula, Malmgren, 

 procured only in deep water by tlie ' Knight Errant.' It 

 is a small form about -^ of an inch in length with a some- 

 what broad and blunt anterior end, the l)rachiec in the 

 preparation being on the anterior ridge, the prostomium 

 being doubled downward as a small and somewhat bifid 

 process, the fillets of the peristomium (Fauvel's rudimentary 

 palps j supporting it laterally and posteriorly. The mouth 



