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 ; figure 80, by A. E. Verrill.) 



