The Cambridge natural history, Vol. 01 (of 10)

by Marcus Hartog; Sydney J. Hickson; E. W. MacBride; Igerna Brünhilda Johnson Sollas

of Ophiothrix fragilis, [490];

of Ophiarachna, [491];

of Ophiuroidea, [494];

of Amphiura squamata, [494];

of Echinus esculentus, [528];

of Echinocardium cordatum, [552];

of Hemiaster philippi, [552];

of Holothuria nigra, [567];

of Antedon rosacea, [586]

Genital plate, of Ophiothrix fragilis, [485];