PLANCHE X, 



Fig. 75.— Ophiacantha sociahilis Kœhler, face dorsale. Gr,=4. 

 Fig. 76. — Ophiacantha sociahilis, face ventrale. Gr.=4. 

 Fig. 77. — Ophiochiton modestus Kœhler, face dorsale. Gr. = 26. 

 Fiof. 78. — Ophiochiton modestus, face ventrale. Gr.=26. 

 Fig. 79. — Amphiura partita Kœhler, face dorsale. Gr.=ll. 

 Fig. 80. — Amphiura partita, face ventrale. Gr.^U. 

 Fig. 81. — Amphiura dispar Kœhler, face dorsale. Gr.=ll. 

 Fig. S2.~~ Amphiura dispar, face ventrale. Gr.=ll. 



