:)8 Trof. M'Intosli's Notes frotn (he 



are especially long a short distance from the tip ; then (Umiu- 

 ishing ill length, they end rather abruptly a short distance 

 within the ocular region, which is somewhat clavate with 

 the tapering tentacle projecting distally. The filament has 

 a similar chordoid skeleton to that of Sahelln and a jointed 

 axis continued into each pinna. The whole apparatus is 

 stifFer than in the ordinary Sahella, and the pinnae finer and 

 more thread-like. Some of the filaments have no eyes, the 

 diminished tip ending in a long slender tentacle with a 

 chordoid axis in the centre. Moreover, the pinnae in these 

 do not terminate abruptly, but gradually becoming shorter 

 end in a series of short papillae (rudimentary pinnae), from 

 which the long tentacular process projects. A series of 

 short tentacular filaments project from each side of the oral 

 fissure. No large tentacle occnrred in this injured example. 

 As Claparede observes, the eyes are confined to the dorsal 

 half of the fan. 



The body is of considerable length — probably, when com- 

 plete, having a length of 4-5 inches. It is flattened ante- 

 riorl}' on the dorsum, as well as grooved for some distance 

 from the collar backward. The ventral surface is rounded 

 anteriorly, the first region having eleven scutes which have 

 their long diameter transverse, whereas the median furrow 

 splits the succeeding scutes, the long diameter of which is 

 longitudinal. The specimen is imperfect posteriorly. 



Tlie anterior region has eleven setigerous processes, the 

 first being small, but all the bristles have the same struc- 

 ture, viz. straigiit striated shafts with tapered bases, and 

 tapering tips with moderate rings, obliquely striated and 

 with serrated edges. Tiie same structure characterizes the 

 posterior bristles, except that the tips are more elongated. 

 The most posterior, however, are absent. All the bristles 

 are deeply immersed in the tissues. Ten rows of hooks in 

 single series occur on each side in the anterior region, and 

 these are longer than those in the next division. The 

 anterior hooks (Pi. III. fig. 10) are avicular, being distin- 

 guished by their moderate necks and greatly elongated 

 tapering bases. The main fang has a series of very fine 

 teeth above it, and these are so fine that in preparations 

 which have been long mounted they are difficult to see. 

 The crown has a forward curvature, but thereafter the 

 posterior outline is straight till it reaches the base. As 

 the great fang leaves the neck at less than a right angle, 

 and as the prow is prominent, the anterior outline is deeply 

 concave. The somewhat tapered prolongation of the base 

 is marked, and the neck and base are striated. These hooks 



