PLANCHE X. 



Fig. 75.~Oph{acantha sociabiUs Kcehler, face dorsale. Gr.=4. 

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

 Fig. 77.—Ophioc}iiton modestus Kcehler, face dorsale. Gr. = 26. 

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

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

 Fig. 80.— Amphiura partita, face ventrale. Gr.=ll. 

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

 Fig. 82,. -Amphiura dispar, face ventrale. Gr.=ll. 



