4 Prof. M'lnfosh's Notes from the 



others green or pur|)le predominate, and the fluid in which 

 the animals lie is always tinged with green (Dalyell). 



Each filament has an elastic chordoid and camerated axis, 

 the caraerse heing after the fashion of the bristles of Nereis 

 or Aricia. They are united by a web inferiorly Cabout the 

 level of the first pigment-band), but free throughout the rest 

 of their extent, and are somewhat flattened processes with a 

 smooth external edge, near which the axis lies ; whilst its 

 inner border is fringed with a dense series of slender pinnae, 

 which likewise have a translucent axis jointed at intervals 

 like the bristles of the (Jhloroemidse. The filaments and 

 their translucent axis gradually diminish distally, but the 

 axis can be traced almost to the extremity. Toward the tip 

 of the filament the pinnse gradually diminish in length, 

 finally forming mere papillae, and thereafter the tapering 

 tip is smooth and of moderate length. When the branchiae 

 have lost their distal ends and regeneration has considerably 

 advanced, the long filamentous processes projecting from 

 the tips give a novel character to the organs. 



Anteriorly the buccal segment occupies a hollow between 

 the two pillars of the dorsal fan, a more or less separate fan- 

 shaped lamella occurring on each side, tinted of a deep 

 reddish brown. From this the marginal collar passes 

 ventrally to expand into the prominent and generally reflexed 

 lamella on each side of the median fissure, where it is dis- 

 tinctly thickened. A band on eacii side of the median oral 

 process joins it to the fold a little higher. 



The flrst shield on the ventral sui'face behind the collar is 

 continuous from side to side, and is the largest of the series 

 of glandular scutes. Thougb it is opposite the first bristle- 

 bundle, that would seem to pertain to the segment behind it. 



'I'he month leads into a simple alimentary canal, which, 

 when seen from the dorsum, forms a moniliform tract from 

 end to end — wider anteriorly and narrower posteriorly. The 

 septum in each segment retains it firmly in position. The 

 contents can Ije seen through the transparent walls of 

 the canal, and in one consisted anteriorly of pale granules 

 and posterioi'ly of muddy sai d. 



The body shows little or no narrowing anteriorly, remains 

 of similar diameter for a considerable distance, then in 

 preservation may increase in breadth behind the anterior 

 third, and thereafter gradually tapers to the tail, ending 

 in the anus, which is often bilobed. In lateral view the 

 margin of the vent slopes from above downward and back- 

 ward, the ventral edge thus projecting considerably. From 

 above the aperture is bifid inferiorly, and a triangular area 



