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

lenticula, [1726].

navicula, [1727].

orbicularis, [1725].

pilidium, [1726].

Conchura, [1724].

tetrodon, [1724].

Conosphæra, [221].

orthoconus, [221].

plagioconus, [222].

platyconus, [221].