tenf.'x 



Fig. 187. Tubicolous Polychaeta. Terebellid (Loimia). A, Side view of 

 young form taken from its tube. A', Side view of pelagic larva in its gelatinous 

 case. After D. P. Wilson. Chaetopterus pergamentaceus . Original. B, Side 

 view of worm in tube. Arrows show the direction of the water currents. 

 B', Dorsal view of anterior part to show the ciliated grooves. Original. 

 Arrows show the direction of the food currents, abd. abdomen ; col. peristomial 

 collar; cup, organ for forming foodballs; e. eye; fan., mu. fan. muscles for 

 moving fans; gl.sh. mucous glands; iVf. mouth; neur. neuropodia forming 

 suckers for attachment of worm to tube ; not. notopodia ; not. 4, notopodia 

 with enlarged chaetae in 4th chaetiferous segment; not. 10, food-collecting 

 notopodia; ot. otocyst; tent, tentacle; thor. thorax; up.l. upper lip, the lower 

 lip (l.l.) is a prominent structure to the right of the tentacles. 



