MUSEUJI OF COMPARATIVE ZOOLOGY. 



285 



Fig. 58. Amphiura incisa, from below ; -I- 



Fig. 59. " " from above ; ^. 



Fig. 60. " " arin-joiuts, profile ; ^. 



Fig. 61. " uereis, from below ; J^-. 



Fig. 62. " " from above ; ^-. 



Fig. 63. " " arm-joints, profile ; ^^-. 



Fig. 6-i. " sp. nov. ? (Station 220), from below ; |. 



Fig. 65. • " " from above; \. 



Fig. 66. " " arm-joints, profile ; \. 



Fig. 67. Ophiochltoii tcnuispinus, from below ; |. 



Fig. 68. " " from above; f. 



Fig. 69. " " arm-joints, profile; |. 



Fig. 70. Ophiacantha Bairdi from below ; \. 



71. " " from above; \. 



72. " " arm-joints, profile ; \. 



73. " Bartletti, from below ; f. 

 Fig. 74. " " from above ; f. 



Fig. 75. " " arm -joints, profile; f. 



76. " <:e;-y/^o;-«w', from below ; \. 



77. " " from above ; \. 



Fig. 78. *' " arm-joints, profile; f. 



Fit 

 Fi^ 



Fi£ 



Fit 



Fir 



PLATE VI. 



show the varied cov- 



Fig. 79. Ophiacantha lineolata, from below; \. 



Fig. 80. " " from above ; \. 



Fig. 81. " " arm-joints, profile ; \. 



Fig. 82. " (f*6v'/jt'///s, from below ; \^-. 



Fig. 83. " " whole disk from above, to 



ering; ^■. 



Fig. 84. " " arm-joints, profile ; '^-^-. 



Fig. 85. " scolopendrica, from below; -|. 



Fig. 86. " " from above ; f . 



Fig. 87. " " arm-joints, profile ; ^. 



Fig. 88. Opldothamnus vicarius ? (young). Station 190, 542 fathoms; ^^. The 

 entire back of the disk is shown, beset with shafts, each bearing a 

 bunch of three or more sharp, slender thorns. These show the em- 

 bryonic form of the thorny stumps so common in Ophiacantha and 

 fillicd genera. Only two joints of the short arms are represented. 



Fig. 89. Ophiomitra iiicim, from below ; -f. 



Fig. 90. " " arm-joints, profile ; \. 



