208 " ENDEAVOUR " SCIENTIFIC RESULTS. 



the middle, and further back the length of each moiety of 

 the band gets less and less, though they persist till nearly 

 the hinder end, and at the same time the depth of the brown 

 diminishes. 



Neither caudal portion shows any anal cirri. 



The whole worm shows evidence of much shrinkage due 

 to the strong alcohol in which it is preserved. 



The head. The prostomium is depressed between the 

 eyes, and is traversed by a convex ridge at its anterior end, 

 which appears to represent a median tentacle, for I can see 

 no definite appendage in the middle line (PI. xl., fig. 55). 

 The paired tentacles lie on the underside of the sloping 

 prostomium ; the upper pair is almost in line with the upper 

 surface of it ; each is very short, rounded, and nearly as 

 broad as it is long. The lower pair are directed downwards ; 

 each is cylindrical and about 3-4 times as long as the upper 

 one. 



The peristomium. The lower lip is a thin transverse fold 

 notched in its middle, and somewhat produced on either side. 



There are three pairs of " peristomial " (or better, " meta- 

 stomial ") cirri. Behind the peristomium is a segment, which 

 bears on e'ach side an oval thickened whitish pad, whence arise 

 two cylindrical processes, one external and ventral, lying 

 against the under surface of the eye ; the other is much smaller, 

 and directed outwards. Behind these again is a faintly 

 marked segment, which bears a pair of larger and stouter 

 cirri, directed backwards. 



The next segment bears the first distinct parapodium, but 

 I can detect no chaeta?. The dorsal lobe is produced into a 

 foliaceous process or dorsal cirrus, resting against the hind 

 wall of the eye ; the small ventral cirrus resembles the 

 following. This segment is banded with brown dorsally, and 

 has but a small lateral brown spot on each side. 



The parapodium of the following segments is uniramous, 

 with pointed lips (PI. xl., figs. 52, 53) ; it bears dorsally and 

 ventrally a large foliaceous cirrus, the former the larger. 

 The aciculum is colourless, with a slightly curved tip ; the 

 chsetae are likewise colourless, of the usual delicacy : they are 

 jointed, with a long simple appendix (PI. xli., fig. 56). 



Loc. East coast of Flinders Island, Bass Strait. 



