8 



• ■ e the median one is shorter. Both cirri as wel! as the gills are 



I bj the presence of numerous small bodies, highly refracting the light. In froni 



of the bran ible series of forked bristles projects; the shortest of them (PI. II. fig. 2), 



anteriorly, have their longest limb curved backward, about four times as long 



as the short one. In the longest bristles however (PI. II, fig 3), situated in a posterior series, 



limb is more straight and measures about five times the short one. The rin 



PI. VI, fig. 2) are gathered in a median group, corresponding t<> the interval between 



the median and lateral dorsaJ cirri; they are of the type of E. foliosa^ like those of E. pilosa, 



but their shortest limb is nol so Munt and the tip of the longest one, in stead of being bent 



kward, shows a forward curvature. 



The neuropodium shows a rounded triangular anterior lip and is provided with a 

 rather long and slender cirrus. lts fascicle contains three kinds of bifurcated chaetae: a (PI. II, 

 the shortest ones, which are faintly forked and have the short limb only re])resented 

 by a spui-; 6 (PI. II, fig. 5), these are about twice as long and broad as the first ones, and 

 the longest limb slighdy curved, with a faint notch near the tip, whereas the short one 

 is pointed and measures about a fourth of the longest limb; < (PI. II, fig. 6), slender, elongated 

 bristles, with the longest limb nearly straight, serrated near the tip and about six times as 

 long as the short one. The anal cirri are; two small rounded platcs, with a straight, median 

 border: in one specimen their transverse diameter is longer than the longitudinal one, in an 

 other specimen both plates were coalesced. 



This species is nearly allied to E. g/o/>osa. 



4. Euphrosyne hystrix Horst. PI. II, ligs. 7— 11 ; PI. VI, fig. 3. 



I [orst, loc. cit. p. 219. 



Stat. 37. Sailus ketjil. 2 specimens. 



A small pelagic worm, of a squat shape, measuring 5 1 /;, mm. in length, and about 2 mm. 

 in breadth: each segment provided with se ven pairs of stout, dichotomously branched gills, 

 the terminal filaments of which are not dilated at the tip. Lateral dorsal cirrus between the 

 second and third gills, not quite as long as these. In front of the branchiae a transverse series 

 of forked bristles, the median ones of which extend from both sides over the bare medio-dorsal 

 field; ringent bristles of the type of E. foliosa. Ventral bristles pardy elongated and slender, 

 half as long as the breadth of the body. Caruncle rather broad. reaching segment V. 



Near Sailus ketjil two small specimens of an Eupkrosyne -species were collected with the 



townet, which species, though closely allied to E. ajjiuis, cannot be identified with it. The 



lias a squat shape and measures in the largest specimen 5'/n mm. in length and about 



2 mm. in breadth. The bare medio-dorsal held is very narrow, hardly visible by the dorsal 



bristles, from both sides bending over it. The number of segments amounts to 29. 



The caruncle is rather broad and reaches the fifth segment; its median keel hardly 

 ond the lateral lobes. There are large dorsal and ventral eyes; the unpaired conical 



