EXPLANATION OF PLATE XII. 



Figure 57. — Nephthys picta, (p. 583 ;) anterior part of body and head, much enlarged ;; 

 dorsal view. 



58. — ^Nephthys bucera, (p. 583;) antpior part of body and head, enlarged ; ven- 

 tral view. 



59.-^Nephthys ingens, (p. 583;) anterior part of body and extended proboscis y 

 ventral view. 



60. — The same ; dorsal view. 



61. — Podarke obscura, (p. 589 ;) dorsal view, from a specimen preserved in 

 ^ alchohol and much contracted in length. 



62. — Nectonereis megalops, (p. 592;) ventral view. 



63. — ^The same ; anterior region of body and head ; dorsal view. 



64. — Marphysa Leidyi, (p. 593;) anterior part of body and head, enlarged about 

 three diameters; dorsal view. 



(Figures 57 and 58 were copied from Ehlers ; all the rest were drawn from nature by J. H, Emerton) 



