Rietsch, on Gephyrea, [443]

Rockworm, [319]

Rods—see Rhabdites

Rohde, on muscles of Nematoda, [128] f.

Rootlet, in Polyzoa, [485], [517]

Rosa, on Oligochaeta, [364], [380], [385], [390]

Rosette-plates, [471], [522]

Rotifer, [201], [202], [210], [216], [222], [226], [227]

Rotifera, [197] f.;

distribution, [200];