PLANCHE I

. 1.—Ophiotypa simplex Kæbhler, face dorsale. Gr.—10. g. 2,—Ophiotypa simplex, vue latérale, Gr.=10.

. 8.— Opluotypa simplex, face ventrale Gr.= 10,

. 4—Ophiopyrqus Alcocki Kæbhler, face dorsale, Gr.=8. g. 5,.—Ophiopyrgus Alcocki, vue latérale. Gr.=s.

. 6.—Opliopyrqus Alcocki, face ventrale. Gr.=s8.

. 7.—Ophiomastus tumidus Kæhler, face dorsale. Gr.=9. . 8.—Ophiomastus tumidus, vue latérale. Gr.=9.

. 9.—Ophiomastus tumidus, face ventrale, Gr.=9.

Echinoderma Mus. Ind. Imvestigator Ophiuroidea. Plate 1

1, 2, 3, Ophiotypa simplex Koehler 4,6, 6, Ophiopyrgus Alcocki Koehler. 7, 8,9, Opmiomastus tumidus Koehler.

+. Koehler, del. Photo-etching, Survey of India Offices, Calcutta, Angust,1898.