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

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

of arms of Ophiuroidea, [491];

of Echinus esculentus, [505] f.;

of Endocyclica, [531] f.;

of Cidaridae, [532];

of Arbaciidae, [532];

of Echinothuriidae, [532];

of Colobocentrotus, [532];

of Heterocentrotus, [532];

of Echinarachnius parma, [543];

of Echinocardium cordatum, [550]