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 ]>ortion shows any anal cirri. 



The whole worm shows evidence of much shrinkage due 

 to the strono alcohol in which it is preserved. 



The head. — The prostomium is de2:)ressed 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 jjaired tentacles lie on the underside of the sloping 

 prostomium ; the upjjer 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 jDair 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 produ(^ed on either side. 



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

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

 bears on each 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 backAvards. 



The next segment bears the first distinct parapodium, but 

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

 foliaceous 2)rocess or dorsal cirrus, resting against the hind 

 wall of the eye ; the small ventral cirrus resembles the 

 following. This segment is banded \\ith brown dorsally, and 

 has but a small lateral brown spot on each side. 



The i)arapodiuin of the following segments is uniramous, 

 with jDointed 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 

 chaetse 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. 



I 



