778 INDEX. 



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

 of, 107. 



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



Rengger, on the diseases of Cebns Azarce, 7; on the diversity of 

 the mental faculties of monkeys. 81: on the 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, 19; 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 (Jtbus 

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

 habits of Mycetes caraya, 246; on the voice of the howling monkeys, 

 002; on the odor of Ctrxus cantpct-tris, C04; on the beards of My cites 

 caraya and Pithecia Satanaa, 607; on the colors of Felis mitix, 610; 

 en the colors of Cervus paludotsus, 613; on sexual differences of color 

 in M-ycetet, 613; on the color of the infant (jiuaranys, 636; on the 

 early maturity of the female of Ccbes Azarce, 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 uystem, rudimentary structures in the, 26, accessory 

 parts of, 183. 



Reptiles, 397. 



Reptiles ar.d birds, alliance of, 188. 



Herein blances, small, between man and the apes, 171. 



Retrievers, exercise of reasoning faculties by, 88. 



Revenge, manifested by anneals, 78. 



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



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



Jthamphastos carinatus, 560. 



Rhea jDarici/iii, 545. 



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

 ively, 5110; attacking white or gray horses, 617. 



RJiyncJicea, sexes and young < ) f, 543 ; Thynchaa auatralis, 543; 

 rtyncftcea benyalentAs, 543; rhynchcea capennis, 543. 



Rhythm, perception of, by animals, 649. 



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



Richard, Sir J., on the pairing of Tetrao vmbellus, 416; on Tetrac 

 urophasiaims, 423: on the drumming of grouse, 423, 427; on the 

 dances of Tetrao pluisiandlitx, 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 nidih'cation of the. 518. 



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

 Chinese, 190. 



Rivalry, in singing, between male birds, 419. 



River-Log, African, tusks and knobs of the, 593. 



