tentacle, inserted between the former of them, has a short terminal joint and does not stretch 

 far beyond the eyes. The palp-plates are pyriform. Each parapodium carries se ven bran- 

 chial arbuscles, with a short, stout stem, dichotomously branched and terminating in 

 numerous filaments, not expanded at the tip. The lateral dorsal cirrus, situated between the 

 second and third branchiae, is not so long as these. In front of the branchiae a series of stout, 

 bifid bristles projects from the dorsum ; they are yellow-coloured and the longest median ones 

 of both sides are crossing each other over the bare dorsal field and the caruncle. There are 

 two kinds of them, long and short ones, which however agree very well in shape and have 

 the shortest limb measuring about a third of the long one (PI. II, fig. 8). The ringent chaetae 

 (PI. VI, fig. 3) appear to be very rare; I could only detect a single one at one side, in the 

 vicinity of the medio-dorsal field. It is of the type of E. foliosa, with the shortest limb rather 

 slender, not much enlarged; the smooth tip of the longest limb is about half as long as its 

 concave, grooved portion l ). 



The n euro podium has an anterior lip of a rounded, triangular shape and its fascicle 

 contains three kinds of bristles, a: short ones, faintly forked, with only a rudiment of a second 

 limb (PI. II, fig. 9); b: somewhat longer than the preceding ones, distinctly forked, with a short 

 limb, measuring about a fourth of the long one (PI. II, fig. 10); c: elongated ones, vitreous, 

 with a long, serrated limb, about six times as long as the short one (PI. II, fig. 11). The 

 a n a 1 c i r r i are two small plates, rounded or faintly cordate. 



5. Euphrosyne mucosa Horst. PI. III, figs. 2 — 4; PI. VI, fig. 4. 



Horst, loc. cit. p. 218. 



Stat. 109. Pulu Tongkil, Sulu-archipelago. 13 M. Lithothamnion-bottom. 1 female specimen. 



A small Annelid, with an oblong oval body, about 7 mm. long and 4 mm. broad (with 

 the bristles). On each side of the dorsum eight branchial arbuscles, strongly branched, with 

 filaments not expanded at the tip. The lateral dorsal cirrus opposite to the third branchia, 

 about as long as this. In front of the branchiae a doublé series of forked bristles-, ringent 

 chaetae of the type of E. foliosa. Caruncle with a thick, cylindrical, median ridge, extending 

 to the anterior region of segment V. 



At Station 109, in the Sulu-archipelago, at a depth of 13 M., a small Euphrosyne was 

 dredged, the upper side of its body covered with much mucus and containing ripe ova. The 

 oblong oval body has a length of about 7 mm., whereas its breadth measures 4 mm., the 

 bristles included. The bare medio-dorsal field is narrow, its diameter being only one eighth of 

 the breadth of the body. The number of its segments amounts to 27. The caruncle is rather 

 broad and reaches the anterior region of the fifth segment; it consists of a thick, cylindrical 

 median ridge and two plane lateral lobes, which are somewhat narrower. The eyes are not 



1) Ehlers' suggestion (1901, p. 37), that in E. armadilloides the ringent chaetae should be entirely absent, therefore appears 

 to me not without doubt; for, when there are only few of these bristles in each segment, they are easily overlooked, as is already stated 

 in my description of a specimen of E. laurcata from Timor (1886, p. 172). 



9 



SIBOGA-EXPEDITIE XXIV 1 a. 2 



