R. crucigera, [303]

Ritter, [8] n., [39], [83], [690] n.

Rivulus, [616]

Rocklings, [649], [288]

Rohde, [113]

Rohteichthys, [582]

Rolph, [113]

Rondeletia, [614]

Rosette-organ, [97]

Roule, [38]