724 



INDEX 



Qualitative effects of food, 228-230. 

 Quantitative effects of food, 225-228. 



Race, affected by internal influences, 

 196-217 ; extinction of, 415. 



Radial symmetry, 34. 



Random sample, 420, 708, 709. 



Rat, tail of, grafted into back, 107. 



Rational selection, 592, 593. 



Rats, variation in digits of, 58. 



Reaumur, experiments in regeneration, 

 316. 



Reciprocal cross, 525, 6 to. 



Records, in animal breeding, 666-672 ; 

 in plant breeding, 645-649; of the 

 herd, 666-670; of pedigree, 670-672. 



Redfield, Casper L.,on prepotency, 574 ; 

 on transmission, 407, 408. 



Reduction, a cause of variability, 163- 

 181, 175, 176; apparent purpose of, 

 167; connection with mutation, 180; 

 end products of, 167, 168; how ac- 

 complished, 169; illustrated, 168; in 

 the male, 169, 170; in the female, 

 165-169; in male and female com- 

 pared, 164; in plants, 171-173; in 

 animals and plants compared, 165; 

 losses sustained by, 170; opportuni- 

 ties for accident during, 171 ; Weis- 

 mann's prediction concerning, 173, 

 174; results in loss of chromatin 

 matter, 170, 173; significance of, 170. 



Reflex action the basis of instinctive 

 acts, 394-397- 



Regeneration, bearing of, on stability 

 of living matter, 316-332; by trans- 

 formation, 323 ; character of restored 

 part in, 326, 327 ; effect of age upon, 

 331 ; effect of flowering period upon, 

 331 ; effect of food upon, 327, 328; 

 effect of gravity upon, 329-332 ; 

 effect of light upon, 328 ; effect of 

 temperature upon, 327 ; first in form, 

 afterward in size, 317; growth in, 

 not uniform, 317, 318; from oblique 

 surface, 334 ; heteromorphosis in, 

 332; internal factors in, 332-335; in 

 animals, 316; in earthworms, 317- 

 320 ; in embryos and eggs, 324, 325 ; 

 in fish, 318; in higher animals, 325, 

 326; in the planarian, 321, 322, 334, 

 335; in plants, 325; in salamander, 

 316; in actinian,334; lateral, 333, 335 ; 

 not always complete, 318-320,323,325; 

 polarity in, 320, 329-333 ; what deter- 

 mines character of restored part, 333. 



Regression, advantage and disadvan- 

 tage of, 485 ; as to stature, 479-481 ; 



diagram of, 489 ; offspring more me- 

 diocre than parents, 484-486. 



Regression coefficient, 466, 487-490. 



Regression table, 479-482. 



Reversion, 16, 192-194. 



Reversion and atavism, 305. 



Rheotaxis, 235. 



Rhinoceros, development of foot of, 60. 



Ribbert, grafting mammary gland on ear 

 of guinea pig, 336. 



Roebuck, meristic variation in horns 

 of, 53, 65, 66. 



Romanes, on instinct, 389; on trans- 

 mission, 354 ; on transmission of 

 mutilations, 367. 



Roots, development of, by external 

 conditions, 104; growth of, in run- 

 ning water, 235. 



Rose, record of, with Nora, 78-80. 



Roulette wheel, how made up, 365. 



Roux, experiments upon segmenting 

 frogs' eggs, 343 ; on preparation of 

 antitoxin, 310. 



Row system of planting in breeding 

 work, 646-649. 



Sachs, experiments on growth of plants, 

 256. 



Salamander, regeneration in, 316. 



Saline solutions, effect of, upon devel- 

 opment, 282-285. 



Sample, random, 420. 



Sawfly, antenna of, developed into a 

 foot, 43. 



Schmankewitsch, experiments with Ar- 

 temia, 102, 283. 



Sea urchin, Loeb's experiments with, 

 278-282. 



Seal, variation in digits of, 57. 



Secretions, chemical action of, 383, 384. 



Seed production a business, 650. 



Seedlings, response of, to gravity, 236. 



Seeds, effect of moisture upon, 232. 



Segmentation, dependence of, upon 

 water content, 178; geometrical 

 character of cleavage in, 339 ; not 

 dependent on fertilization, 178. 



Selection, 577-598 ; blemishes and 

 accidental injuries bearing on, 590; 

 cessation of, 288 ; effect of, upon type 

 and variability, 445, 446; general 

 principles involved in, 581-592 ; his- 

 torical knowledge of the breed essen- 

 tial in, 579, 581 ; ideals in, 578, 579; 

 importance of pedigree in, 592 ; in- 

 creased number of " points " in, 590 ; 

 indirect effects of, 447, 448 ; influence 

 of age in, 589 ; fallacy of " foundation " 



