172 EUPHROSYNE LAUREATA. 



row extends a little beyond the third internal branchia. 

 There are two kinds of bifurcated bristles. Those of the 

 ventral fascicle and the greatest part of the dorsal row 

 are smooth ; the longest limb of their fork is slightly 

 bent backward and about three to four times longer than 

 the spur. The ventral bristles are smaller than the dorsal 

 ones and measure only two thirds of their length. Besi- 

 des these I found in the dorsal row a second kind of 

 serrated bristles , consisting of a shaft much more slender 

 than in the foregoing , the fork being however much stout- 

 er. The longest limb of the fork is slightly bent over 

 the inferior two thirds of its length ; the concave side of 

 this portion seems to be hollowed out and is furnished 

 with parallel , rib-shaped serrations , rightly compared by 

 Ehlers with the teeth of a file. In this concave side of 

 the long limb fits the club-shaped short limb, which has 

 not quite half its length ; its convex side is also furnished 

 with serrations corresponding to those of the long limb. 

 These bristles are mentioned neither by Savigny nor by 

 Grube, but I believe they overlooked them, being much 

 smaller than the other bristles. Similar bristles are des- 

 cribed by Haswell in E. Mastersii ^). 



JEuphrosyne mediterranea Grube, — Baird , loc. cit, p. 237. 

 — Grube , Beschreibung neuer oder weuig bekannter An- 

 neliden, 6er Beitrag; Archiv f. Naturg. 1863, p. 37, pi. 

 IV, fig. 2, 



Three small individuals, collected by Cantraine in the 

 Mediterranean , are apparently referable to this species. 

 Though Grube says that there are 7 branchiae in each series, 

 I find 8 of them , two inward and six outward from the 

 second dorsal cirrus, but I believe with M'Intosh such a 

 discrepancy of little importance. The branchiae are not very 

 ramose and the tips of the branches not foliate , only some- 

 what club-shaped. There are two kinds of bifid bristles. 



1) Loc. cit. p. 346. 



^otes from the Leyden IMuseum, Vol. VIII. 



