vi 
Subject Index 
Sex Eatio, inheritance of v 73-85, 4'di\-lid; in 
Spinax iii 321 
Sheei) V 210, 212 
Shcp2)ard's Corrcctioiu i 81, 181 ii 147, 304, 504 
III 308-312 V 450-459 
Sliyxcss V 125 et seq. 
Sihnhi2}s, Types of in Plants ii 59-62 
Sieliuess Table, graduation and analysis of ii 2(10- 
272, 503, 504 iii 52-57 
Silkworm III 113-130 v 486 
Similar and Simultaneous Parts i 324 
Skew Variation iv 169-212; relation to selection 
IV 505-510: see also Frequency Distributions 
Skull, determination of capacity in 203-206 ; skull 
measurements and brain weight iv 67-74, 105- 
123 ; variation and correlation in the human 
I 409-467 III 191-214 iv 280-312, 351-302 
V 86-104 ; for head characters see Head 
Sloe Tree i 29 
Small-Pox I 375-383 ii 120, 135-144 iv 313-331, 
483-510 V 301-364, 431-435 
Snails I 109-124, 468-492 ii 24-43 iii 209-306 
V 14, 30, 33-38, 41, 51, 485 
.foil's : see Piy 
Spearman's Correlation Formulae in 160 v 212 
S2}ecics, Flcmentary and Linnean i 11-29, 304-319, 
305, 408-492 iv 363-373 
Spleen, human in 63-83 
Spurious Association ii 133 
Spurious Correlation i 456, 461 v 482 
Social Status, Small-Pox and Vaccination n 135- 
144 
Stability, Oryanic i 328 
Stable Population with Mcndelian Inheritance in 
263 
Starfish ii 403-473 v 220 
Statoblasts of Peclinatclla maynifica I 128 
Stature, change with age i 38-49 ; of criminals 
I 177-227; and brain weight iv 51-03; among 
Scotch insane v 298-350, supplement 
Sterility, self-fertilized poppies iv 395-398; of 
Drosophila v 210: see also Fertility, Fecundity 
Still Born, number of in Buenos Ayres in 99-103 
,S7of/.- I 243 V 482 
Subsample Vran-)i from a Sample, Significance of 
V 181-183, 315-333 
Summation Method of calculating moments from 
statistics iv 374-378 
Survival of tlic Fittest Species i 300 
Symmetry i 324 ; in an abnormal species i 255 ; 
bilateral ii 115-121, 307-320 
Syphilis, inheritance of v 211 
Tallies, corrective terms for moments of trapezia 
II 9; for computing probable errors iv 385-393; 
deviates of the normal curve for each ])er niille of 
frequency V 405 ; probability integral ii 174-190; 
of sums of the first seven powers of natural 
numbers ii 474-480 ; for testing the goodness of 
lit of theory to observation i 155-103 
Teachiny of Statistics v 477 
Telcyony in 51 
Temper iii 152, 155, 188 v 125 et seq., 460-409 
Tcntaculocysts of Aurelia aurita i 90-108 
Tetanus v 210 
Thistle v 210 
Thorn Apple i 243 ii 55 
Time of Absence from Nest (bees and wasps) v 365- 
386 
Time Estimation v 486 
Trades and Sickness in 53 
Trades, Small-Pox and Vaccination ii 135-144 
" Types " and Races ii 501-512 
Ty2)hus Fever v 424-430 
Tuberculosis v 478 
University of London, v 19-21 
Unproyrcssive Communities v 300 
Useless Cliaractcrs i 109 
Utility and Oryanic Correlation i 346 
Vaccination i 375-383 ii 126, 135-144 iv 313- 
331, 483-510 V 361-364, 431-435 
Valvular Disease of the Heart ni 71 
Variation Curves: see Frequency Curves 
Variation (in de Vries' theory) i 365-374 
Variation (fluctuating) i 11, 321 et seq. ; an 
abnormal species i 255 ; in Arcella ii 321- 
337 ; in bees v 420, 484 ; in Aurelia aurita 
I 90-108 ; and binary fission i 400-407 ; in 
Ceratophyllum v 485 ; in Cichorium intybus 
V 184-186 ; in lesser celandine ii 145-164; and 
environment of Chilomonas v 53-72 ; in the 
earthworm iv 213-229 ; in Eupagurus pri- 
dcauxi II 191-210; in parts of flowers i 11-29; 
in Helix arbustorum v 387-399 ; in Scottish 
insane v 298-350, supplement ; in Lotus v 485 ; 
in Moscatel ii 108-113 ; variation coefficients 
for Man, table of iv 32 ; in meristic series 
III 321-338 ; in Ophiocoma nigra ii 463-473 ; 
in Paramecium i 400-407 v 213-297, 485 ; 
in Philosamia cynthia in 113-130 ; in Pul- 
m<niaria iii 398-468 ; in Scyphomedusae v 484; 
secular variation i 109, ' 118-119, 261-264, 
408-467 II 371, 395 ; in the human skull 
I 408-467 HI 191-244 iv 286-312 v 86-104 ; 
in snails v 485; in sparrow's egg i 250-257; of 
stature in mankind i 39; in wasps v 407-422 ; of 
weight of human viscera in 03-83 ; for other 
characters, especially human ones, see under 
special headings 
Vari((tions, Favourable, maintenance and con- 
tinuity of in critical periods v 211 
Veyetative Growth i 11 
Viscera, weight of the human in 03-83 
Vivacity III 152, 155, 183 v 460-469 
Wasp v 305-380, 407-422 
Weiyht at Birth, influence of size of parent upon 
among sheep v 212 
Weldon^s Life v 1-52 
Wheat I 307 
Wliitethorn i 28 
Whitlow Grass i 12 v 39-41 
Woodruff I 339-344 iv 341 
Xenoyamie i 12 
