121 Tiof. M'lutosli's Notes from the 



In the middle segments the shaft and the crown of the 

 hook are about equal in length, the former increasing from 

 the narrow base to the broad shoulder, beyond which it is 

 very markedly constricted (PI. III. fig. 8). 'it then curves 

 forward and again backward — dilating in its progress to the 

 crown, which is very high and has five distinct teeth above 

 the great fang, which curves downward at considerably less 

 than a right angle to the neck. So far as could be observed, 

 no gular bristles occur in this species. The neck has oblique 

 striae internally, and longitudinal stride are in the upper 

 region of the shaft. In the posterior segments the crowns 

 of the hooks are perhaps a little less elevated, but four or 

 five teeth are still visible. The tube is free, composed of 

 secretion coated with reddish mud. 



This form differs from Praxillella afnnis, Sars, in the rim 

 of the cephalic plate, which in the latter is " nach hinten 

 zu fast geschieden,^-' whilst in both the nuchal organ is long. 

 Eyes are present in Sars^s species, absent in this. The pro- 

 boscis is smooth, whereas in P. affinis it has papillae. The 

 number of bristled segments, of unarmed caudal segments, 

 absence of gular bristles in the hooks, and the structure of 

 the bristles also diverge. 



Claparede (1868) describes his Praxilla collaris as having 

 a cephalic lobe with a large " collar/' by which he means 

 the rim, the anterior end of the ridge projecting far forward 

 like a conical prow. The vascular rmgs extend from the 

 fifth to the ninth segment. The hooks of the first three 

 segments differ from the others. There is nothing in this 

 to connect it with the present form, except that he says the 

 fifth segment is shorter than those in front and behind, but 

 it is also larger. It bears two vascular bands (ceintures). 

 He says nothing about eusheatliing, nor does his figure show 

 this. 



No species of the family is more abundant in the Gulf of 

 St. Lawrence than Maldane sars'i, Malmgren, which swarms 

 in the greyish mud of Gaspe Bay, and on similar ground in 

 125 fathoms off Cape Rosier. In regard to size, moreover, 

 some of the examples exceed any of those mentioned by 

 Arwidsson in his excellent treatise on the Scandinavian and 

 Arctic forms. Thus one from Station 9, 1873, is over 

 90 mm. in length, and yet a portion of the anterior end and 

 the cephalic plate are absent. 



The cephalic plate is very uniform in structure throughout 

 the series, and corresponds with Arwidsson's figures *, the 



* Skandin. u. arktischen Maldan. Taf. vi. fios. 194 & 197. 



