POTTS—POLYCHATA : AMPHINOMID#. 357 
2. Chleia longisetosa, sp.n. (Plate 45. fig. 5.) 
Measurements. Length 11 mm., greatest breadth 4 mm. (without sete); no. of 
segments 21. 
The body of this annelid is regularly fusiform in shape, proportionately broader at the 
middle than OC. fusca. The body is of a pale colour throughout, only relieved by a row 
of purple spots on the crest of the caruncle. The branchize are white, but the dorsal 
cirri are deep purple as in C. fusca. 
In most details a strong resemblance to C. fusca may be traced. The median crest 
of the caruncle is, however, not quite so elevated and compressed, and the median 
tentacle barely attains to one-half of the length of the caruncle. The head and its 
appendages are otherwise similar, and the branchie also agree with those of C. Jusca in 
their structure and the backward direction of their main axis. 
The very characteristic appearance of the species is due to the enormous length and 
thickness of the white glassy setze (Pl. 45. fig. 5), while the dorsal cirri also show up 
conspicuously on account of their length and deep coloration. 
The general nature of the setze shows that this form should be classed with the group 
of C. fusca, differing, however, in the absence in the dorsal feet of the slender attenuate 
type of bifid bristle (a). In C. fusca, moreover, as mentioned above, the setze of type (5) 
predominate in the anterior segments and are replaced entirely by those of type (¢) in 
the posterior segments. In this species setze of type (c) are the more numerous through- 
out the length of the body. Some slight difference may be traced between the sete of 
this type in the anterior and posterior regions, the number of serrations on the external 
limbs increasing from 17-18 to 25-26. 
Locality. A single specimen, S. Suvadiva, Maldive Is., 45 fathoms, amongst mud. 
Another single specimen, badly preserved, appears to belong to this species. Mulaku, 
A 73. 
3. Chleia rosea, sp.n. (Plate 45. fig. 3.) 
Measurements. 11 mm. long, 3 mm. broad ; no. of segments 20. 
The body is of a fusiform shape, but distinctly slenderer than is C. longisetosa. It is 
uniformly coloured a reddish pink, even the sete sharing the hue. The head, though 
rather smaller, is similar to that of C.fusca, with two conspicuous pairs of eyes, the 
anterior larger and nearer together. There is a large stout median tentacle longer than 
the caruncle, as in C. fusca, but in contrast to the species just described. The lateral 
tentacles and palps are comparatively short and slender. The branchiz, which, as usual, 
begin on the fifth body-segment, are exceptionally well-developed and so long as to over- 
lap in the middle line (PI. 45. fig. 3). The tendency for the longitudinal axes to be 
directed inwards, instead of posteriorly, is in contrast with the arrangement in the 
preceding species. Lateral branches are not so numerous or so long proportionately 
as in C. fusca and longisetosa. 
The sete though shorter and more sparsely developed than in C. longisetosa are 
essentially similar. In both the slender attenuate type of dorsal seta (a) is absent. The 
simple bifurcate seta (b) of the anterior segments is replaced posteriorly by the sete 
