MUSEU.M OF COMPAEATIVE ZOOLOGY. 285 



Fig. 58. Ainphiura incisa, from below ; -1. 



" " from above ; \. 



" " arm -joints, profile; -1. 



" ucreis, from below ; ^-f-. 



" " from above ; ^-. 



" " arm-joints, profile ; ^-. 



" sp. nov. ? (Station 220), from below ; -1. 



• " " from above ; f. 



" " arm-joints, profile ; -f. 

 Fig. 67. Ophiochitoii tenuispinus, from below ; f . 



Fig. 68. " " from above; f. 



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

 Fig. 70. Ophiacantha Bairdl from below ; \. 



Fig. 71. " " from above ; \. 



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



Fig. 73. " Bartldti, from below ; |. 



Fig. 74. " " from above; |. 



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



Fig. 76. " cervicornis, from below; \. 



Fig. 11. " " from above ; f . 



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



PLATE VI. 



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

 " " from above ; f . 



" " arm-joints, profile ; |. 



" lacipcllis, from below ; ^-^-. 



" " whole disk from above, to show the varied cov- 



ering; J^. 

 " " arm-joints, profile ; ^i^-. 



" scolopendrlca, from below ; f. 



" " from above ; f . 



" " arm-joints, profile ; -f. 



Ophiofhami/us vieari/<s ? (young). Station 190, 542 fathoms ; ^-^. Tlie 

 entire back of the disk is sliown, beset witli shafts, each bearing a 

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

 bryonic form of the thorny stumps so common in Ophiacantha and 

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

 Fig. 89. Opldomilra iiicisa, from below; -|. 

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



