EXPLANATION OF PLATE XII. 



FIGURE 57. Nephthys picta, (p. 583 ;) anterior part of body and head, ranch 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 



ventral view. * 



60. The same ; dorsal view. 

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



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 abou 



three diameters ; dorsal view. 



(figures 57 and 58 were copied from Elilers ; all the rest were drawn from nature l&amp;gt;y J. H. Emerton 



