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Show 4:)2 OltYX . I~DEX. I'AI.I .. I~. dilfcrcnccs in the stl"i tlul:tnt organs of, i. :18:1. Ory:r: /eiU'OI'!J.r, usc of the horns of, ii. 251, :!G:I. O:sphrantr.,. l'llfus, s<'xual dillcrence in the colour of, ii. 2HG. OSTRJOJJ, African, sexes nnd inculmtion of the, ii. 205. OsTmCJJES, stripes of young-, ii. 18+. Otarin ju~ata, mane of the mall•, ii. 267. Otarirt 71i(ji'<' S< 'i! lls, dillrrPncc in the coloration of the sexes ot: ii. 2H7. Otis beny11lcn~is, love-antics of the male, ii. G8. Otis larda, poly"amous, i. 2G!); tln·oatpouch of the male, ii. !'1H. 0lJZEJ,, ring-, colours and nitlification of the, ii. 179. Ouz~-:r., water-, colours and nidifica-tion of the, ii. 170. Ovi!Jos moscltatus, horus of, ii. 2-1,7. Ov Jl'OSITOJt of insects, i. 2.-,+. Ocis cyl'loceros, mode of Jighting of, ii. 249. 0\'UU' of man, i. 14. OwEN, Prof., on the Corpora Wolfli:nm, i. 1G; on the great toe in man, i. 16; on the nictitating membrane and semilunar fold, i. 2:1; on tho development of the posterior molars in dillerent races of man, i. 2G; on the length of the crocum in the Koala, i. 27; on tho coccygeal vertebrre, i. 2!); on rud imentary structnres belonging to the reproductive system, i. Hl; on abnormal contlitions of the human uterus, i. 12:J; on the number of digits in the Jchthyopterygia, i. 125; on the canine teeth in man, i. 1213; on tho walking of tho chimpnnr.rc nml "rang, i. lil9; on the mastoid procossi's in the higher apes, i. 14:1; on the haiJ·in •ss of elephants in elevatccl district~, i. 149; on the c·mhlal nrtcbraJ of monkeys, i. 150; classification of mammalia, ~. 187; on the hair in monkeys, i. HI+; on the piscinc afllnitics of the lehthyosnnrians, i. 204; on polygamy and monogamy among the antclQpes, i, 2G7 ; on the horns Autilocn:pra cwu;riccma, i. 280; on the musky odour of crocodiles durin" tho breeding season, ii. 2!); on th~ gc:ent-g lands of snakes, ii. 30; on the Dngong, Ca<"hnlot atHl Ornithorlt~;ncltus, ii. 24~ ; on thc· antler~ or' the r<>cl <leer, ii. 2!1:!; on the dentition of tho can1elida!, ii. 257 ; on the tusks of the :Mammoth, ii. 25R; on the horns of the Irish elk, ii. 2!19; on the 1·oicc! in the girafl'c, porcupine, aud stag, ii. 274:; on the laryngeal sac of the gorilla and orang, ii. 27G; on the odoriferous gl:mrls of mammals. ii. 279, 280; on t.he cficcts of emascu lation on the Yocal organs o[' men, ii. :~:\lJ; on the 1·oice of lf•tlobatcs O[fili:<, ii. :1:12; on American monogamous monkeys, ii., !'16:2. Owr.,;. white, new mah•s found h)·, ii. 10!"•. O:.:ynvtus, difl'erence of the females o£ two species of'. ii. 10:1. P. ]'ACIIYDJ.:IUIAT.\1 i. 2GR. PAOJ·:T, em thl' abuormal de,·elopmcnt of hairs in man, i. 2;,; on the thickness of the skin on the soles of the Jcct of infant~, i. 118. PAISTJ~G, i. ~;~:!. J'a{;emon, chelru of' a species of, i. :J:ll. L'a/;crll'nis, sen~:~ I diiTereuC'cs of colout· in, ii. 2:11. l'ulm01·nis .fm·anictts, colour of IJcak of, ii. 179. Pal;cornis rosa, young of. ii. 188. l'alamedca cornuta, spurs on the winf;S ii. 47. PALEOLITmC period, i. 183. l'AT,ESTJXJ·:, habits of the chaffinch in, i. :J07. PAT,f,Af;, on th<' perfection of the senses in tho Mongolians, i. 11 D; ou the want of conucxion b tween climate and the colour of the skin, i. 241; on the polygamous habits of Anlifopc Saiya, i. 267; ou the li<'hter colour of horses and cattle it.;' winter in Siberia, i. 28:!; on the tusks of the musk-deer, ii. 25G, 258; on tho odoriferous glands. of mammals, ii. 279; on the odortfc-l'AUlAJ: JS. INDEX. 453 rous glands of the musk-d0cr, ii. ~80; 011 winter changes of colour in mammals, ii. 298; on tlte ideal of female bc: lllty in North China, ii. :344. ./'a{mrtris ar;l'r'SSrlr'ills 1/Lit.w-lr•, variations ot'the, i. 100. PA~II'A~, horses of the, i. 2:lu. l' ANiiJ•;,'I E~IS, hypoth<'sis of, i, 280, 2R+. l>ANNIVUJ,t 'S caruosus, i. 19. l'ujJifio, sexual difli!rcnces of colour- ' in;.; in species of~ i. 380; proportion of the sexes in North A lllCrit ·an species oJ; i. :.IOU; coloration of the wings in species of~ i. :J9G. Pa}Jitio a.sccmins, i. :189. J'a[lilio Sc•srJSiris and Cltitdr·unw, variability of; i. 402. l'apilio J'umns, i. 310. PAPTLJONlD,E, variability in the, i. 402. 1>.\I'UAXS, line of separation between tit~, ami the Malays, i. 218; beards of the, ii. 322; hair of, ii. :.HO. PAI'UANS and l\falays, contrast in clmracters of, i. 2l!i. PAitADIHJ·:, Birds of, ii. 100, 18l; supposed by Lc ·son to he polyg:llllOils, i. ~GO; rattling of their quills by, ii. 61; rackct-~haped feathers in, ii. 7:3; sexual dillercncos in colour of, i1. 7(); decomposed feathers in, ii. 7+, !J7 j display of plumage by the malc·, ii. 88. l'w·. rcli~· ·a upodr, lJarhless feathers in the tail ot; ii. 7-l:; plumngo of; ii. 7H; anti P. Jlnpwmrt, cli,·ergence of the fpmnles of; ii. Hl:.l. Prtmrlt:~c t l'llJI"a. ii. 75, 78. l'Ait.IC:UAY, Indians of, Prndkation of ••ycbrows aml <•yelashcs by, ii. :l+8. 1'AitAKEJ•;T, i\ ustralian, variation in the colour of the thio-hs of a male ii. 126. " ' 1'AitAJ,LJ;J,1S~1 of dcl'elnpmcnt of spc-ci<• s and languages, i. :iH. l'.1 HASJTJo:S on man an< I animals, i. 12; :1~ ~1·idencc of specific identity or d1 stmctncss, i. 219; immunity from, correlated with colour, i. :!+~. PAJt.J·:NTAL allettion, partly a resu lt ol natural selection, i. 81. J>AJtENTR, age of, influence upon sex of o!l~pring, i. 30~ . PA It! NJTI, sexual difi'ercucc of co lout· in, ii. 174. PAitK, Mungo, negro-women teachinotheir ehildren to love the truth L D.); his treatment by the ucg:·ow.• mJCn, _i. 95, 326; on negro opintons of the appearance of white 1ncu, ii. 346. l'\HJWT, racket-shap<'tl feathers in the tail of a, ii. 7;~; instance of benevolence in a, ii. 109. l' .\HLtOTS, imitative faculties of, i. 44; ~·han~e of colour in, i. 152; livingIll tnplets, ii. 1 OG; aflection of; ii. I 08; colours of, ii. 223; sexual dillereuces of colour in, ii. 231; l'Olours and nidifieation. of the, ii. 171,174, 17G; immature plumage ~·_f ~he2 ii. 188; musical powers oJ; II. ,33,J. l' .lltTUI·:=-ormNESlS in the Tenthrediua ·, i. :314; in Cynipidm, i. 314; in <'rnstacea, i. :n 5. P.\ltTJtLOUE, monogamous, i. 26!); proportion of the sexes in the, i. :l!lli; female, ii. 194. "i'Aln'lt li)(JJ.;.J>ANCGR," ii. 68. J>.I.J!T itiDGES, living in triplets, ii. 1 OG; ~pring coveys of male, ii. 107 ; distingui ·hing persons, ii. llO. I' ants C(l)l'tdens, ii. 17 4. Passer, sexes and young of, ii. 212. Pa.~ser lwachyrlactytns, ii. 212. l'a:sscr doml'stinrs, ii. 170, 212. l'asscr montanus, ii. 170, 212. l'ATAGO:s'IAXS, self-sacrifice by, i. 88. 1'.\:l'TJ·; ~~o~, Mr., on the Ayriunicl;r, 1. :3G~. l'A liLJSTAS of Brazil, i. 22!1. l'o ro cristatus, i. 2!)0 ; i i. 13G. Paco ultdicus, i. 290, ii. 1:lG; possession of spurs by the female ii. +G, 162. ' Pw·o niyripcnnil•, ii. 120. P.\. YAGlJAS Indian~, thin legs nml thick nrms of the, i. ll7. l'.\.YAN, Mr., on the proportion of the sexes in sheep, i. :l05. PJo:ACOCK, polygamous, i. 2GD; sexual characters of, i. 2!JO; pu~naeit~· of the, ii. 46; rattling of the quills by, ii. Gl; elongated tail-coverts of the, ii. 72, 97; loyc of display of the, ii. 135; 68, S7; ocellated spots of |