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;) anterior part of body and head, enlarged ; ven- 

 tral view. 



59. Nephthys iugeus, (p. 583 ;) anterior part of body and extended proboscis j 

 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. 



6*2. 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 38 were copied from ELlers ; all the rest were drawn from nature by J. H. Emerton) 



