426 



INDEX. 



RiNG-orzEL, colors and niJirioation of the, 

 ii. 102. 



ItiPA, Katlior, on the (lifTiculty of distin- 

 (JTiiishin;; the racos of the Chinese, i. 2(1". 



EivAi.RT, ill singing, between male birds, 

 ii. M. 



KivEK-uoo, African, tiislcs and knobs of 

 tlie. ii. 2">4. 



EivER-s, analogj- of, to i.slands. i. 196. 



KoAcii, bri;rlitness of male during breeding- 

 season, ii. 13. 



EonBERV, of strangers, considered honor- 

 able, i. yo. 



EoBERTSOX. Mr., remarks on the develop- 

 ment of the horns in the roebuck and 

 red-deer, i. 279. 



Robin, pugnacity of the male, ii. 38 ; au- 

 tumn song of the, ii. 51 ; female, singing 

 of the, ii. 51 ; attacking other birds with 

 red in theu- plum.ige, ii. 106; young of 

 the, il. 199. 



RouisET, on the difference of size of the 

 male and female cocoons of the silk- 

 moth, i. 335. 



Rodents, uterus in the. i. 118; absence of 

 secondary se.xual characters in, i. 259; 

 sexual ditferenees in the colors of, ii. 272. 



Roe, winter change of the, ii. 2i4. 



RoLLE, F., on the origin of m.in, i. 4 ; on a 

 change in German famiUes settled in 

 Georgiii, i. 237. 



Roller, ii. 53. 



Romans, ancient, gladiatorial exhibitions of 

 the, i. 97. 



Rook, voic? of the, ii. 58. 



RossLER, Dr., on the resemblance of the 

 lower surface of buttei-llies to the bark of 

 trees, i. 3S0. 



RosTRU.M, sexual difference in the length 

 of^ in some weevils, i. 247. 



RcDiMENTARV Organs, i. 17; origin oC i. 

 31. 



Rudiments, presence of, in languages, i. 

 58. 



RrDOLPin, on the want of connection be- 

 tween climate and the color of tlie skin, 

 i. 232. 



Ruff, supposed to be polygamous, i. 261 ; 

 proportion of the sexes in the, i. 297; 

 pugnacity of the, ii. 39, 44; double 

 moult in, ii. 78, 80; duration of dances of, 

 ii. 96 ; attraction of the, to bright objects, 

 ii. 107. 



RfMiNANTS, m-ile, disappearance of cinine 

 teeth in, i. 139; ii. 311 ; generally polyg- 

 amous, 1. 258; analogy of Laniellicbrn 

 beetles to, i. 362; suborbital pits ot^ ii. 

 267; sexual differences of color in, ii. 

 274. 



liiipicola crocfa, disi)lay of plum.nge by 

 the male, ii. 88. 



RCri'ELL, on o.inino teeth in deer and an- 

 telopes, il. 246. 



Russia, numerical proportion of male and 

 female births in, i. 291. 



linticilla, ii. 172. 



RCtlmeyer, VxoU on the sexual differences 

 of monkeys, ii. 30lj. 



RuTLANDsiinsE, numerical proportion of 

 mole and female births in, i. 291. 



S. 



Sachs, Prof., on the behavior of the male 

 and female elements la fertilization, i. 

 26.'>. 



SArRiFiCE.s. Human, i. 175. 



Sagittal crest in male apes and Austra- 

 lians, ii. 304. 



Sahara, birds of the. ii. 161; animal in- 

 habiUints of the. ii. 214. 



Sailors, growth oC delayed by conditions 

 of hie. i. 110; long-slirhted, i. 113. 



Sailors and soldiers, dilfereuce In the pro- 

 portions of. i. 112. 



St. John, Mr., on the attachment of mated 

 birds, fi. 104. 



St. Kilda, beards of the inhabitants of; ii. 

 306. 



Sahno eriox. and S. vmbla, coloring of the 

 male, durin:.' the breeding-season, ii. 14. 



Sii/i/io !)/caoi/(»^\. 4. 



/fki/ino sd/tir, ii. 9l 



Salmon, leaping out of fresh water, i. 80; 

 male, ready to breed liefore the female, 

 i. 2.')2 ; proportion of the sexes in, i. 299 ; 

 male, i>ugnacity of the. ii. 3 : male, char- 

 acters ot; during the breeding-season, ii. 

 3. 14; spawning of the. ii. 18; breeding 

 of immature male. ii. 2o6. 



Salvin, O., on the Humming-bii-ds, i. 260; 

 ii. 161 ; on the numerical proportion of 

 the sexes in Humming-birds, i. 298, ii. 

 212; on C/umxrpetes and Penelope, ii. 

 61; on Selattplioru.'i phiti/c^rcun, ii. 62; 

 on Pipra ileliciona, ii. &3 ; on C/ui«mo- 

 rhijiifhun. ii. 70. 



Samoa Islands, beardlessness of the natives 

 of, u. 307, 3*3. 



Sand-skipper, i. 323. 



Sandwich Islands, variation in the skulls ' 

 of the natives of the, i. 105; superiority 

 of the nobles in the. ii. 340. 



Sandwich Islanders, lice o£ i. 211. 



San Giuliano, women of, ii. 341. 



Sant.\ll recent rapid increase of the, i. 

 128; Mr. Hunter on the. i. 232. 



Sap/iirina, characters of the males oi; i. 

 326. 



Sarl'idiomU melanonotus, characters of 

 the young, ii. 177. 



Sars, O.. on Po)itoporeia offlnU. i. 319. 



Sat urn in carpini, attraction of males by 

 the female, i. 303. 



Saturn id lo. difference of coloration in the 

 sexes of, i. 38.'). 



Satuniiittee, coloration of the, 1. 38.3, 885. 



Savagf., Dr.. on the lighting of the male 

 gorillas, ii. 309 ; on the habits of the go- 

 rilla, ii. 346. 



Savage and Wjiuan, on the polygamous 

 h-ibits of the gorilb, i. 258. 



Sav.\ges, imitative faculties of i. 5,"). 1,V); 

 causes of low moraUtj- of. 1. 9:3 ; uniform- 

 ity oi; exjiggorated, i. 107; long-sighted, 



