25 



of C/i/. fusca. The caruncle extends to the third segment; the median antenna is somewhat 

 shorter. The branchiae commence on the 4 th segment. 



Stat. 51. Madura-bay. in Molo-strait. 1 specimen. 



Perhaps a young specimen of C/il. vio/acea, with a similar marking on the dorsum of 

 the sesfments: it has a lensjth of 7 mm. and consists of about 20 seements. 



Genus Bathychloeia Horst. 



Branchiae bipinnate like in Chloeia\ first pair, on the fifth body-segment, much larger 

 than those of the following ones. Eyes absent. Ventral bristles along the inner border coarsely 

 denticulated. 



1. Bathychloeia sibogae Horst. PI. VIII, figs. 12 — 17. 



Horst, loc. cit. Vol. XXXII, p. 175. 



Stat. 211. 5°4o'.7 Lat. S., i2o°45'.5 Long. E. Banda-Sea. Depth 1158M. 1 specimen. 



The length of the single specimen is 7 1 /., mm., its greatest breadth 3 mm.; the number 

 of its segments amounts to 16. The body (PI. VIII, fig. 12) has an elongated oval shape, 

 tapering posteriorly ; it is colourless except the anterior part of the prostomium, that is dark 

 black with a pale margin. This black colour is also visible at the ventral side, as a triangular 

 spot, situated between the distal part of the palps (PI. VIII, hg. 13); the surface of the latter is 

 covered with small black dots, that are caused by pale brown granules, lying in the distal end 

 of the long, cylindrical cells, that compose the outer layer of those organs. The bristles are pale 

 yellow, opalescent, in the posterior segments strongly elongated, dorsally as well as ventrally, 

 and surrounding the anal extremity with a hairy envelopment. The caruncle extends backward 

 till upon the third segment and shows 10 to 12 loose, indistinct folds ; the median tentacle 

 hardly reaches to half its length. No eyes are visible. The mouth seems to be limited posteriorly 

 by the 2 d segment, that is longitudinally folded in the middle (PI. VIII, fig. 13). The branchiae 

 are small, consisting of a main stem and four plain lateral branches, except the first pair, that 

 is situated on the 5 th segment; these are strongly developed, extending over two 

 segments and bear six ramified lateral branches. In the anterior segments the branchiae are 

 supplied by a rather long cirrusdike appendage. The dorsal cirri are very slender, not quite 

 as long as the tuft of setae; the ventral cirri rather long, with an enlarged basal part. The 

 anal cirri are tapering, as long as the two posterior segments. The bristles much resemble those 

 of Chlocnca at/autica l ), also dredged at a great depth (2745 AL); those of the ventral fascicle 

 (PI. VIII, fig. 14) are very slender, bifurcated, the short limb more resembling a tooth, whereas 

 the long limb has its inner border slightly convex and coarsely serrated. The dorsal bristles 

 are thicker, their short limb measuring about a fourth of the long one; beyond the fork the 

 last one is somewhat curved outward and faintly serrated along its inner border (PI. VIII, fig. 15). 



1) Annel. polychaeta, p. 15, PI. I, fig. 4; PI. IA, figs. 10 — 13. 



SIKOGA-EXPEDITIE XXIV 1 a. 



