— 210 — 



very small, quite slender cerarian setae, accompanied by a conspicuous 

 cluster of two to several slender, auxiliary setae of various lengths 

 which form a fringe about the lateral margins of the body; with no 

 clustering of pores about the cerarian setae. Anal lobes without dorsal 

 chitinization: with several slender setae at the base of the anal lobe 

 setae; with a very slight and inconspicuous ventral, chitinized area. 



Fig. 2. 



Phenacorcns cyrenaicus n. sp.: A, posterior portion of abdomen left half dorsal, right 



half Tentral; B, tarsal claw; C, antenna; D, cerariua, from cephalic region. 



Dorsal body setae few, relatively small, slender. Ventral body setae 

 more numerous, but scarcely larger. Triangular pores very small, not 

 conspicuously abundant. Multilocular pores present on the ventral side 

 of the last three or four abdominal segments, few. Tubular ducts few, 

 confined chiefly to the ventral surface. Legs moderately stout, the tar- 

 sus about half as long as the tibia, the claw (Fig. 2 B) with a distinct 

 tooth. Antennae (Fig. 2 C) slender, 9-segmented. Anal ring setae but 

 slightly shorter than the anal lobe setae. Dorsal ostioles very incon- 

 spicuous. 



Notes. — The marginal fringe of slender setae is the most con- 

 spicuous feature of this species and should make its recognition a simple 

 matter. 



