15 



as the short ones ; ringent bristles of the type of E. foliosa. Ventral bristles shorter than the 

 largest dorsal ones. Caruncle three-lobed, extending with its median keel till segment V. 



At station 310 and 315, an Eu/>/irosyne-spec\es was dredged, obvious by the enormous 

 length of its dorsal bristles. lts body has an oblong, oval shape, not much narrowed at its 

 posterior end. The largest specimen measures about 10 mm. in length, its breadth being 6 mm., 

 the bristles included. The diameter of the bare medio-dorsal region is about one fourth of the 

 breadth of the body. The number of segments amounts to 24. The specimen of Stat. 315 only 

 measures 5 1 /;, mm. in length. 



The caruncle is three-lobed; it consists of a broad, elevated keel, extending till the 

 anterior half of segment V, and of two lateral bands, reaching the posterior margin of the 

 fourth segment. The eyes are small ; the stout, unpaired tentacle, inserted between them, has 

 a long, slender terminal joint, stretching as far as the end of the lateral bands. In front of 

 the oral orifice there are two pyriform palp-plates, directed forward with their narrow end ; 

 its posterior margin is bordered by a wedgeshaped lobe, lying in the middle of the ventral 

 region of segments III and IV. Each parapodium (PI. V, hg. 1) carries ten cirriform 

 b r a n c h i a e ; the eight lateral ones stay crowded next to each other, whereas the two median 

 gills are separated by a rather great distance. Both dorsal cirri are somewhat longer than the 

 branchiae ; the lateral one of them is situated between the second and third gill. The dorsal 

 fascicle contains two kinds of forked bristles. Some of them (PI. V, fig. 2), placed in a single 

 series directly in front of the branchiae, are nearly as long as these and have their shaft 

 covered with small, triangular spines ; their longest limb is about thrice as long as the short 

 one. Among these bristles are ringent setae of the type of E. foliosa, of nearly the same 

 length (PI. VI, fig. 7) ; they have a slender shaft, and the plain, superior half of their longer 

 limb is nearly vertical, making a sharp angle with their curved and grooved inferior part. In 

 front of this series there is another row of stout bristles (PI. V, fig. 3), thrice as long as the 

 preceding, vitreous ancl impregnated with calcium carbonate over their total length or only 

 at the forked tip ; their longest limb is three to four times longer than the short one. The 

 neuropodium has an auricular anterior lip, and is furnished with a slender ventral cirrus ; its 

 fascicle contains forked bristles of different length (PI. V, fig. 4), the longest of which however 

 measure only two thirds of the length of the long setae of the notopodium. The anal cirri 

 are two small oval plates. 



Hitherto no species of Euphi'osyne was known, provided with such a great number of 

 cirriform branchiae. 



11. Euphrosyne obiensis Horst. PI. IV, figs. 4 — 6; PI. VI, fig. 8. 

 Horst, loc. cit. p. 215. 

 Stat. 142. Laiwui, Obi major; reef. 1 specimen. 



An Annelicl of moderate size, about 30 mm. long and 10 mm. broad; each segment 

 with nine pairs of short, stout, highly ramose branchial arbuscles, the branches of which are 



r 5 



