Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

tricornis, [1089].

Rhopalastrella, [526].

Rhopalastromma, [528].

Rhopalastrum, [526].

arcticum, [529].

bandaicum, [525].

clavatum, [528].

hexaceros, [529].

hexagonum, [525].

irregulare, [528].