778 INDEX. 



Religion, deficiency of among certain races, 106; psychical elements 

 of, 107. 



Remorse, 129; deficiency of, among savages, 149. 



Rengger, on tbe diseases of Cebus AzarcB, 7; on the diversity of 

 the mental faculties of monkeys, 31; on tbe Payaguas Indians, 37; 

 on the inferiority of Europeans to savages in their senses, 38; revenge 

 taken by monkeys, 78; on maternal affection in a Cebus, 79; on the 

 reasoning powers of American monkeys, 87; on the use of stones by 

 monkeys for cracking hard nuts, 91; on the sounds uttered by Cebus 

 Azarcel 95; on the signal-cries of monkeys, 98; on the polygamous 

 habits of Mycetes car ay a, 246; on the voice of the howling monkeys, 

 602; on the odor of Cervus campcstris, 604; on the beards of Mycetes 

 caraya and Pithecia Satanas, 607; on the colors of Felis mitis, 610; 

 on the colors of Cervus paludosus, 613; on sexual differences of color 

 in Mycetes, 613; on the color of the infant Guaranys, 636; on the 

 early maturity of the female of Cehes Azarcp, 636; on the beards of the 

 Guaranys, 639; on the emotional notes employed by monkeys, 652; 

 on American polygamous monkeys, 674. 



Representative species, of birds, 533. 



Reproduction, unity of phenomena of, throughout the mammalia, 

 8; period of, in birds, 551. 



Reproductive system, rudimentary structures in the, 26; accessory 

 parts of, 183. 



Reptiles, 397. 



Reptiles and birds, alliance of, 188. 



Resemblances, small, between man and the apes, 171. 



Retrievers, exercise of reasoning faculties by, 88. 



Revenge, manifested by animals, 78. 



Reversion, 41 ; perhaps the cause of some bad. dispositions, 155. 



Rhagium, difference of color in the sexes of a species of, 333. 



Rhamphastos carinatus, 560. 



Rhea Darwinii, 545. 



Rhinoceros, nakedness of, 64; horns of, 576; horns of, used defens- 

 ively, 590; attacking white or gray horses, 617. 



RJiynchcBa, sexes and young of, 543 ; rhynclioBa australis, 543; 

 rhynchma bengalensis, 543; rhynchma capensis, 543. 



Rhythm, perception of, by animals, 649. 



Richard, M., on rudimentary muscles in man, 13. 



Richard, Sir J., on the pairing of Tetrao umbellus, 416; on Tetrno 

 urophasiarms, 423; on the drumming of grouse, 423, 427; on the 

 dances of Tetrao phasianellus, 431; on assemblages of grouse, 460; 

 on the battles of male deer, 571; on the reindeer, 574; on the horns 

 of the musk-ox, 576 ; on antlers of the reindeer with numerous 

 points, 582; on the moose, 587; on the Scotch deerhound, 589. 



Richter, Jean Paul, on imagination, 84. 



Riedel, on profligate female pigeons, 475. 



Riley, Mr., on mimicry in butterflies, 367; bird's disgust at taste of 

 certain caterpillars, 370. 



Ring-ouzel, colors and nidification of the, 518. 



Ripa, Father, on the difficulty of distinguishing the races of the 

 Chinese, 190. 



Rivalry, in singing, between male birds, 419. 



Kiver-hog, African, tusks and knobs of the, 598. 



