198 " ENDEAVOUR '■ SCIENTIFIC RESULTS. 



end, though the posterior is sHghtly narrower than the 

 anterior. 



The worm measures 25 mm. by 8 mm. over the elytra, 

 and 9 mm. over the neuropodial chaetae. 



It has 38 parapodial segments, and 15 pairs of elytra. 



The elytra are on the usual segments 1, 3, 4, 6 20, 22, 25, 



28, 30, the last elytron is followed by 5 parapodial segments. 



Most of the dorsal cirri, as well as the subanal cirri are 

 absent. 



The body wall is unpigmented ; the chaetas are pale yellow. 



The elytra are grey, overlap fore and aft, as well as right 

 and left, covering the back, and hiding even the bases of the 

 notopodial chaetas. 



They are rather soft to the touch, and are fringed. The 

 first one is grey all over, rather darker near the dorsal region. 



The rest have the anterior region white, the exposed 

 region pale grey, becoming darker towards the dorsal region, 

 and posteriorly, but paler again in the lateral region. 



This exposed portion is covered sjjarsely with small dark 

 rounded conical tubercles (PI. xl., fig. 47). Near the 

 posterior margin there is a row of widely separated white. 

 i.e., unpigmented, and probably transparent in life, long, 

 finger-shaped papillae. These are absent on the first 

 elytron. On the anterior elytra there may be as many 

 as eight of these soft papillae ; on the majority I note 

 some 4-6, while on the posterior ones only three are present. 

 When viewed under a microscope the tip of each is seen 

 to be formed by a short conical cap of highly refringent 

 chitin ; at the base, too, is a ring of chitin, the greater part 

 of which is thin and evidently pliable, for many of them 

 are bent (PI. xl., fig. 48). There are also now seen a number 

 of short filamentous processes, on the surface near the 

 posterior margin, similar to the fringe, but of less length. 

 The fringe extends on to the hinder margin, but the filaments 

 are shorter and less crowded than on the external margin. 



The areola is white, circular and subcentral. The elytra 

 are subcircular, with the usual anterior emargination. 



The parapodia. — The neuropodimn is produced into a 

 long rounded point, which bears at its apex a small digitiform 

 supra-acicular " ligule " (PI. xl., fig. 51). On its upj^er 

 surface the neuropodium carries the sessile notopodium. 

 The chaetae in both lobes are very numerous. 



I 



