PLATE XL Continued. 



FIG. 30. Spirorbis quadrangularis Stimpson, p. 241. Caudal seta of specimen 



from Greenland. 



31. Chitinopoma 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 32 fathoms. 

 All figures by the author: i, 2, 17-20, X 65 ; others, X 398. 



(339) 



