358 



CALIFORNIA ACADEMY OF SCIENCES. 



Bepetitive marks 171 



Reproductive cells, immortality of 

 among matazoa, 10; simplicity of 

 confirmed by Spencer, 17. 

 Retardation, explanation of by Cope, 

 25-26; definition of, 73; instance 

 of Cope's law of, 169, 



RhynchopLanes 303 



Ridgway on relation between color 

 and geographical distribution in 

 North American birds, 2il ; in- 

 stances of melanism 243. 



Roadrunners , 276 



Robin varied 203, 217 



Rock-thrush 81 



Romanes, explanation of Darwin's ho- 

 pothesis of pangenesis, 3-5; on 

 cessation of selection, 23: theories 

 on pammixis, 24-25; on inherltence 

 of acquired characters, 28; exam- 

 ples of instinct due to transmis- 

 sion of acquired characters, 41; 

 supports Darwin's theory of ac- 

 quired habits, 41; criticises Spen- 

 cer's 1st and 3d form in evidence 

 of proof of acquired characters, 

 43-44; supports Darwin's theory of 

 sexual selection, 88; criticises Wal- 

 lace's ideas on sexual selection, 

 92-93; on aesthetic taste of animals, 

 97-98; on species, lOG-107; on phys- 

 natural iological selection, 110-112; 

 opposes selection as originator of 

 species, 113-115; reply to Meldola, 

 115-116; reply to Galton, 115; phys- 

 iological selection opposed by 

 Wallace. 116-117; reply to Wallace's 

 criticism on physiological selec- 

 tion, 118-119; controversy with 

 Dyer, 123-124. 



Rostrhamus 267 



Ryder, theory of heredity opposed to 

 Weismann, 17; on inheritance of ac- 

 quired characters, 19; experiments 

 on Japanese goldfish recorded by, 

 34. 



Salpinctes 236 



Sandpipers 202 



Sapsucker , 150, 165 



yellow-breasted 154 



Sauermann, experiments on the influ- 

 ence of food on color 227 



Saxicola 335 



ienanthe 187 



Sayornis 215 



aquaticus 243 



nigricans 147, 148, 152, 243 



Schurmann, natural selection not cre- 

 ative, 51; discussion of origin of 

 variations, 63. 



Scolecophagus 146. 218,236, 295 



carolinus, acraptotic feathers of . . . 136 



Scotiaptex cinereum lappooicum 152 



Scops asio 243 



Seebohm, criticism of physiological 

 selection, 120-123; glacial epoch as 

 a factor in isolation, 249. 



8eedeat«rs 3l2 



Segregation, definition of environal, 

 industrial, austentational, defen- 

 sive, nidificational, chronal, cycli- 

 cal, seasonal, spatial, geographi- 

 cal, local, migrational, transporta- 

 tional, geological, fertilizational, 

 artifical, reflexive, conjugational, 

 social, sexual, germinal, floral, im- 

 pregnational, 128-130; institution- 

 al, intensive, 131. 



Segregation of the fit, 116, 120; objec- 

 tions to, by Dyer, 123. 



Segregation, potential and prepoten- 

 tional 130 



Seiurus 216 217, 328 



aurocapillus 187, 328 



noveboracensis 328 



Sematic colors, definition of 194, 200 



Setophaga 330 



miniata 330 



picta, distribution of black on. 147. 148 

 ruticilla, distribution of black on, 

 147-148; instance of correlative 

 colors. 156, 221. 



Sexual Coloration, Beddard on 89, 90 



Sexual intensification, explanation of. 



68, 69 



Sexual recognition, law of 209 



Sexual selection, Darwin on, 80; criti- 

 cized by Wallace, 82-83; discussed 

 by Wallace, 85-86; Stolzmaun's 

 view ol, 91; Peckham on, 88; Bed- 

 dard opposed to, 88; Romanes sup- 

 ports theory of, 88; Wallace's objec- 

 tions criticised by Romanes, 92-93; 

 Weismann on, 97; summary of 101, 

 102. 



Shrikes 218,317 



Sialia 222,229, 236, 336 



arctica 158 



siilis 213, 222 



Sitta 236, 334 



canadensis 188 



carolinensis 187 



Siskin, pine 180 



Size, segregate, definition of 180 



