EXPLANATION OF PLATE XVII. 



FIGURE 86. Fotamilla oculifera, (p. 617 ;) in its tube, with branelme fully expanded, 



from a living specimen, found at Eastport, Maine. 

 87. Cistenides Gouldii, (p. 612 ;) lateral view. 

 87a. The same ; head and branching, dorsal view. 

 88. Sabellaria vulgaris, (p. 611 ;) lateral view. 

 88a. The same; view of the operculnm and tentacles, from above. 



(Figures 84, 88, 86a \vere drawn from nature, by J. H. Emcrton ; 87, 87a by A. E. Verrill.) 



