EXPLANATION OF PLATE XV. 



FIGURE 79. Ammotrypane fimbriata, (p. 604;) ventral view. 



80. Cirratulus grandis, (p. 606;) natural size, from a living specimen ; lateral 



view. 

 81. The same ; natural size, from a preserved specimen ; dorsal view. 



(Figures 79 and 81 were drawn from nature by J. H..Emerton ; flgnre 80, by A. E. Yerrill.) 



