Rhynchaea bengalensis.
Rhynchaea capensis.
Rhythm, perception of, by animals.
Richard, M., on rudimentary muscles in man.
Richardson, Sir J., on the pairing of Tetrao umbellus; on Tetrao urophasianus; on the drumming of grouse; on the dances of Tetrao phasianellus; on assemblages of grouse; on the battles of male deer; on the reindeer; on the horns of the musk-ox; on antlers of the reindeer with numerous points; on the moose; on the Scotch deerhound.
Richter, Jean Paul, on imagination.
Riedel, on profligate female pigeons.
Riley, Mr., on mimicry in butterflies; bird’s disgust at taste of certain caterpillars.
Ring-ouzel, colours and nidification of the.
Ripa, Father, on the difficulty of distinguishing the races of the Chinese.