580 



INDEX OF SUBJECTS. 



Cow, variation in number of teats, 188 



Crab, extra parts of iipprnd.'i;.'"'-. 527 

 536; variation in segmentation of ab- 

 domen, 95 



Crati'rnni/.r, extra win;.'. _'-." 



Crayfish, variation in number of gene- 

 rative openings, 152; repetition of 

 parts of chela , .V_".i. 532, 537; extra 

 parts in antenna?, 53s 



< 'rilin-llii, abnormal branching of au arm, 

 440 



Criuoids, radial joints, 421; variation in 

 number of rays, 435 ; 4-rayed varieties, 

 436; 6-rayed varieties, 437; 3-rayed 

 and 5-rayed varieties of a 4-r;m d 

 form, 437; variation in number of 

 canals in stems, 438; abnormal 

 branching, 438 



(.'rixiu, division of embryo.-. 556 



( 'r<>.-*nrchu8, teeth, 227231 ; zebra, 230, 

 231 



Crustacea, theory of descent of Vertt - 

 brata from, 29; of salt lake-, lull: 

 Secondary Symmetry in, 525; Hoince- 

 osis in, 149 



< 'n/jitiili muni* ripm-iii*, extra legs, 509 



Cryptophagus .-(uiiicu*, di'iitutux, double 

 (?) antenna, 5."iii 



Ctenodrilit.*, double tail, "ii',.", 



Cucitmaria phuu-i. with six radii, 433; 



double mon.-ter, ~>(\('\ 

 acicnli, double monster, 566 



('nun, one lower molar absent, 209 



L'li/n'i x.vc/<-/-/;'x, imperfect variation to 

 4-rayed state, 437; variation in num- 

 ber of canals in stalk, 438 



Curve of Frequency of Variations, 37, 64 



Cuvierian organs, variation in number of, 

 135 



Cyclopia, 458 



Ci/;i nun ofor, cervical vertebrae, 33 ; colour- 

 variation of young, 41; atrutnx, 

 brachial plexus. 130 



f '//// Icdii, variability of ocelli, 289 



Cyneelurus, teeth, 222, 224 



jili<iln* jinrfiiriuf, extra molar, 204 

 iifs carpiti, bulldog-headed varie- 

 ties, 57; hungaricus, ditto, 58; tinnitus, 

 division of tins, 451 



Cv|irns. 4- horned sheep, 285 



('ii/i.-i'lns, brachial plexus, 131 



<'i/*tiil>li<>r<i cristiitn, premolars, 238; 

 'molars, 243 



I>achshund, hallux in, 401 ; duplicity of 



hallux and pollex, 401 

 Dactylopodites, extra, "r_'s 

 linrti/liijiailii, jn-emolars, 255 

 Darwin's solution of problem of Species, 



5; views oh Itevrrsion, 77; on sudden 



Variation in eye-spots, 289 

 Dasyuridoi, incisors, 247 

 I><tfijnrui<, iiici>ors, 247 ; premolars, 255 ; 

 molars, 25(i 



*, i-ii-rrrinnx, variation in molars, 

 256 



lntH*, molars, 25H 

 J>i ili'jiliiln I'uplmrliitr, colours of larva-, 



305; hiji/n'iiliiii'ii, 305 

 Illinium* lujhriiln*, extra antenna?, 523 

 Descent, Doctrine of, assumed to be 



true, 4 

 Diaptomus, colour-variation of et-'^rs, 



44 



I>i,-ii ii/!i-.-< ti>rijiititu.-i, incisors, 245 

 Diddphyidje, incisors, 240 

 Didelphys, teeth, 246, 258 

 Digits, Variation of 



MAMMALS. (.'</y</vo/;<x, 374 ; Cat, 

 313; Ccn-ux, 379; Dog.-, 4n] : 

 Eriiinct'iix, 397; Elfphnx, 397; 

 Goat, 377; Herpestida?, 3 Hi; 

 Horse, 360; Jli/lntmt,'.--. :',\i'>: 

 Maciictt*, 340; Man, 324 ; Mule, 

 360, 370; Ox, 374, 383; Pig, 

 3sl, 387; Sheep, 373, 380 

 BIRI>S. Anas, 392; Aqnil<i, 393; 

 Archibuteo, 392: It/itm. 393; 

 Fowl, 390 ; Larus,393; Pheasant, 

 393; Jii.^1,. 39C.; Turkey, 393 

 EEPTILES. Chiili-iili'*, 395; Cix- 



tud,,, 39H 

 Reduction in number, Man, 355, 



358 ; Artiodactyla, 383 

 Union of, Ox, 383; Pig, 387 ; Man. 355 

 Variation in, associated with other 



variations, 399 



Inheritance of Variation in, 398 

 Recapitulation of evidence, 400 

 Dimorphic condition, its relation to the 



monomorphic condition, 37 

 Dimorphism in Spinal nerves, 138; in 

 position of generative openings in 

 I'lK-lti/drilim, 165, 168; in secondary 

 sexual characters, 38 

 Diopatra, abnormal repetition, 159 

 liiacoidea (Echiuid), 4-rayed specimen. 



442 

 Discontinuity of Species, 5 



in Variation, a possibility, 

 17; suggestion as to it- 

 nature, 6s, ,3i>s 

 in chemical processes, 1 6, 



48, 72 



in colour-variation, 43, 48, 

 72 ; in colour-patterns, 

 48 



in states of matter, 16 

 of Meristic Variation per- 

 haps mechanical, 70 

 of Substantive Variation 

 perhaps in part chemi- 

 cal, 71 

 in the Variation of spinal 



nerves, 145 



in the Variation of the 

 generative organs of 

 Annelids, 168 



