HARDWICKE'S SCIENCE-GOSSIF. 



197 



resemble, with uncommon closeness, a series of tiny 

 bamboo canes of great pellucidness. 



Ci7-ratuliisl>0}-ealis\stxcetd.mg\y abundant in certain 

 localities of the shore where soft, porous sandstone 



segments of the body as well as from the head : they 

 are organs of touch, have no cilia, and serve to aerate 

 the peritoneal fluid ; there is a curved black line on 

 each side of tlie head ; the bristles are not very inter" 



+ 'H^!- 



Fig. 112. — Aj-emcola piscatomiu. 



m 



Fig. 1 1 1 . — Phyllodoce lavimosa. 



Fig. 113. — Siphonostoina vest Hum. 



VN'/f 



Fig. 114. — Pontobdella vuiricata. 



abounds. It is somewhat like a Tcrebella, but, save 

 in the presence of bundles of filaments near the head, 

 it differs from that genus in most other respects. The 

 branchial filaments spring irregularly from several 



Fig. 115. — Sagitta hipunctata. 



esting, some being curved like an S, while the rest 

 are long and slender. Laicodore ciliatiis is another 

 rock-boring worm of a small size, and distinguished 

 chiedy by having flattened conical branchiae, of a 



