312 



U.S. NATIONAL MUSEUM BULLETEST 227 



— noS 



Figure 83. — Trochochaetidae, a-g, Trochochaeta multisetosa: a, thoracic parapodium from 

 setiger 2, anterior view; b, same, from setiger 3; c, same, from setiger 4; d, same, from 

 setiger 7; e, limbate, hairy capillary neuroseta from same; /, worn penicillate acicular 

 neuroseta from same; g, penicillate acicular neuroseta from thoracic region of young 

 specimen (Cape Cod Bay), h-k, Trochochaeta zvatsoni: h, thoracic parapodium from 

 setiger 3, posterior view; x, neurosetae from same; /, thoracic parapodium from setiger 5, 

 anterior view; k, neurosetae from same. 



boscis protrusible as a voluminous, thin-walled lobulate sac with 

 numerous short dicotymously branched lobes, with surface densely- 

 ciliated (fig. 82c). 



Anterior thoracic region consisting of about first 20 segments (in 

 larger specimens; 16 segments in small specimen from Cape Cod; 

 9 segments in young metamorphosed benthonic stage; see Hannerz, 



