INDEX. 



427 



„ 118; rate of increase among:, usually 

 small, i. 117; retention of the prehensile 

 power of the feet hy, i. 136; tribes of, 

 supplanting one another, i. 154 ; improve- 

 ments in the arts among;, i. 1T5; arts of, 

 i. 225 ; fondness ot, for rough music, ii. 

 64; attention paid by. to personal ap- 

 pearance, ii. 822; relation of the sexes 

 among, ii. 847. 



Baw-fly, pugnacity of a male, i. 353. 



6aw-flies, proportions of the sexes in, i. 

 305. 



Saxicola rubicola, young of, ii. 210. 



Scalp, motion of the, i. 20. 



Scent-glands in snakes, ii. 28. 



Bchaaffhausen, Prof., on the develop- 

 ment ot the posterior molars in different 

 races of man. i. 26 ; on the jaw from La 

 Naulette, i. 122; on the correlation be- 

 tween muscularity and prominent supra- 

 orbital ridges, i. 126 ; on the mastoid pro- 

 cesses of man, i. 13S; on modifications 

 of the cranial bones, i. 141 ; on human 

 sacrifices, i. 175 ; on the probable speedy 

 extermination of the anthropomorphous 

 apes, i. 193; on the ancient inhabitants 

 of Europe, i. 22S ; on the effects of use 

 and disuse of parts, i. 23S ; on the super- 

 ciliary ridge in man, ii. 301 ; on the ab- 

 sence of race-differences in the infant 

 skull in man, ii. 303; on ugliness, ii. 387. 



iSchaum, H., on the elytra of Dytlscus and 

 Ifydropvru.% i. 333. 



Schelvek, on dragon-flies, i. 352. 



Schiodte, on the stridulation of Hetero- 

 cerm, i. 368. 



Schlf.gel, F. von, on the complexity of 

 the languages of uncivilized peoples, i. 

 59. 



ScnLfcGEL, Prof., on Tanysiptera, ii. 1S2. 



Schleicher, Prof., on the origin of lan- 

 guage, i. 54. 



Schleiden, Prof., on the rattlesnake, ii. 28. 



Schomburgk, Sir B, f*n the pugnacity of 

 the male musk-duck ?f Guiana, ii. 40; 

 on the courtship of Evpicola crocea, ii. 

 83. 



Schoolceaft, Mr., on the d^mculty of fash- 

 ioning stone implements, i. 133. 



6c5.atee, P. L., on modified secondary 

 wing-feathers in the males of Pipra, ii. 

 62 ; on elongated feathers in night-jars, ii. 

 69 ; on the species of Chab-morhynchm, 

 ii. 76; on the plumage of Pelecanus 

 onocrotatus, ii. 82; on the plaintain- 

 eaters, ii. 169 ; on the sexes and young 

 of Tadorna variegata, ii. 197; on the 

 colors of Lemur macaco, ii. 277 ; on the 

 stripes in asses, ii. 291. 



Bcolecida, absence of secondary sexual 

 characters in, i. 312. 



Scolopax frenata, tail-feathers of, ii. 61. 



Scolopax gallinago, drumming of, ii. 60. 



S'-olopax Javemis, tail-feathers of, ii. 61. 



Scolopax major, assemblies of, ii. 97. 



ScMopax Wilsonii, sound produced by, ii. 



Scolytus, stridulation of, L 36S. 



Scoter-duck, black, sexual difference in 

 coloration of the, ii. 216; bright beak of 

 male, ii. 217. 



Scott. J., on the color of the beard in man, 

 ii. 304. 



Scrope, on the pugnacity of the male salm- 

 on, ii. 3 ; on the battles of stags, ii. 229. 



Sc udder, S. H., imitation of the stridu- 

 lation of the Orthoptera, i. 343; on the 

 stridulation of the Acridiidoz, i. 346; on 

 a Devonian insect, i. 319 ; on stridulation, 

 ii. 315. 



Sculpture, expression of the ideal of beau- 

 ty by, ii. 333. 



Sea-anemones, bright colors of, i. 313. 



Sea-bear, polygamous, i. 260. 



Sea-elephant, male, structure of the nose 

 of the, ii. 264 ; polygamous, i. 260. 



Sea-lion, polygamous, i. 260. 



Seal, bladder-nose, ii. 265. 



Seals, their sentinels generally females, i. 

 71 ; evidence furnished by, on classifica- 

 tion, i. 1S3 ; sexual differences in the col- 

 oration of, ii. 273 ; appreciation of music 

 by, ii. 317 ; battles of male, ii. 229 ; ca- 

 nine teeth of male, ii. 230 ; polygamous 

 habits of. i. 260 ; pairing of, ii. 257 ; sex- 

 ual peculiarities ot'. ii. 264. 



Sea-scorpion, sexual differences in, ii. 9. 



Season, changes of color in birds, in ac- 

 cordance with the, ii. 77 ; changes of plu- 

 mage of birds in relation to, ii. 172. 



Seasons, inheritance at corresponding, i. 

 273. 



Sebituanl ii. 324. 



Sebright -Bantam, i. 285. 



Secondary sexual characters, i. 245 ; rela- 

 tions of polygamy to, i. 257 ; gradation 

 of, in buds, ii. 129 ; transmitted through 

 both sexes, i. 270. 



Sedgwick, W., on hereditary ftndency to 

 produce twins, i. 128. 



Seem ann, Dr., on the different appreciation 

 of music by different peoples, ii. 318; on 

 the effects of music, ii. 320. 



Selasphorus platycercus, acuminate first 

 primary of the male, ii. 62. 



Selby, P. J., on the habits of the black 

 and red grouse, i. 260. 



Selection, double, i. 267. 



Selection of male by female birds, ii. 95, 

 117. 



Selection, methodical, of Prussian grena« 

 diers, i. 10S. 



Selection, sexual, influence of, on the col- 

 oring of Lepidoptera, i. 390 ; explanation 

 of, i. 248, 252, 262. 



Selection, sexual and natural, contrasted, 

 i. 270. 



Self-command, habit of, inherited, i. 88' 

 estimation of, i. 91. 



Self-consciousness, i. 60. 



Self-preservation, instinct of, i. 85. 



Self-sacrifice, by savages, i. 84; estima- 

 tion of, i. 91. 



Semilunar fold, i. 23. 



Semnopithecu-% i. 1S9; long hair on th< 

 heads of species of, i. 184, ii. 363. 



