PLATE XI.— Continued. 



Fig. 30, Sfirorbis quadrangularis Stimpson, p. 241. Caudal seta of specimen 

 from Greenland. 



31. Chithiofoma greenlandica (Morch) Levinsen, p. 229. One of the 

 shorter collar setae (longest ones broken) of specimen on tubes of 

 Nothria conchylega from off the eastern coast of New England, 

 in 33 fathoms. 



All figures by the author; T, 2, 17-20, X 65 ; others, X 398- 



(339) 



