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

Tetraplecta, [923].

pinigera, [924].

quadricornis, [924].

tetrahedra, [923].

Tetraplectida, [923].

Tetrapyle, [645].

cardiopyle, [646].

circopyle, [645].

circularis, [645].

cladacantha, [648].