360 



CALIFORNIA ACADEMY OF SCIENCES. 



Tetraonidje 257 



Tetro 236 



Thomson, explanation of anabolism 

 and katabolism, 68; with Geddes 

 places sexual intensification upon 

 firm basis, 73. 



ThrasEeetus • 270 



Thrashers 196, 332 



Thrushes, water 328 



Thrush, wood 185 



varied 186 



Thryothorus bewickii 254 



ludovicianus 254 



Titmice 196 



Tits 333 



Todd, J. E., on directive colors 201 



Towhee 212, 230, 309 



California 182, 203 



Transmission, abridged or simplified, 



definition of 80 



interrupted or latent, definition of. 79 

 mutual and amphigonous, defini- 

 tion of 79 



•sexual, definition of 79 



uninterrupted or continuous, defi- 

 nition of 79 



Trochilidffl 284 



Trochilus 221. 236 



TroglodytidfB 332 



Trogon 277 



TrogonidBB 277 



Turdidse 335 



Turdus musteliniis 185 



Turkeys 263, 264 



Tympanuchus 261 



Tyrannidffi 285 



TyrannuB 216, 217, 218, 285 



crassirostris, instance of correla- 

 tive colors 155 



dominicensis, instance of correla- 

 tive colors 155 



melancholicua couchii 286 



tyrannus 155, 182, 199, 286 



verticalis 153, 254,255, 286 



vociferans 254, 255 



Urubitiaga 270 



anthracina 146 



Use and disuse, principle first sug- 

 gested by Lamarck, 2; principle ac- 

 cepted by Darwin, 3; explanation 

 of, by Darwin, 25; discussion of, by 

 Spencer, 44-45; criticized by Poul- 

 ton, 47. 



Vines, an examination of some points 

 in Prof. Weismann's theory of 

 heredity, 11; admits the immortal- 

 ity of protoza, 11; questions ex- 

 planations of evolution of immor- 

 tal protoza into mortal metazoa, 

 11; criticism of Weismann's theory 

 of heredity, 12; criticism of Weis- 

 mann's theory of continuity of 

 germ-plasm, 13; Weismann's reply 

 to, 15. 



VlreonidEB 317 



Vigor, segregate definition of 131 



Vultures, American 267 



Vireo 157, 196. 215, 317 



atricapillus 221 



crassirostris 318 



flavescens 318 



flavifrons 157 



flavoviridis 157 



ochraceus 318 



Variations, Weismann's theory of, 55, 

 56; Weismann's theory of, argued 

 against by Hartog, 56-57; explana- 

 tion of, 59-60; explanation of con- 

 servative variations, 61; explana- 

 tion of progressive, 61-62; second- 

 ary laws of, Brooks, 62; Schnr- 

 mann's discussion of the origin of, 

 63; further discussion of. 71; Gu- 

 lick's criticism of Brooks' theory 

 of, 72. 



Wag-tail 216, 217, 331 



water.. 217 



Wallace, criticized on account of argu- 

 ment on v:\riations, 52-53; opposed 

 to Darwin's theory of sexual selec- 

 tion, 82-83 ; criticism of sexual 

 selection opposed by PouUon. 84; 

 on sexual selection, 85-86 ; Ro- 

 manes' objections to his views on 

 sexual selection, 92-93; objections 

 to physiological selection, 116-117; 

 Romanes' reply to criticism, 118- 

 119; on recognition markings, 200- 

 201; on geographical distribution, 

 234. 



Wax-wings 216, 217, 316 



Bohemian 190 



cedar 190 



Japanese 316 



Warbler, Audubon's 219 



bay- breasted 185 



