INDEX 



Proper names and titles of sections are in small capitals; page refer- 

 ences to illustrations in italic numerals. 



Aborigines of Australia, 274 



New Zealand, 274, 284 



North America, 274 



Pacific Islands, 274 



South America, 274 



Tasmania, 274 



West Indies, 274 

 "Accessory" chromosome, 157 

 Achondroplasy, 69, 117 

 Achromatin, 134 



differential distribution, 147, 201 



in cell body, 199 

 ACKERT, Effects of Selection on Para- 



mecium, 257 



ACQUIRED CHARACTERS, INHERITANCE 

 OF, 226-237 



Darwin on, 227 



Lamarck on, 227 



Weismann on, 227 



definition of, 228 



general objections to, 228, 229 



specific objections to, 229-234 

 Adaptive responses, 46, 47 

 Adrenal gland, fed to tadpoles, 222 

 African negro, 109, 277 



in Jamaica, 284 



in U. S., 284 

 Age of human race, 272 

 Albinism, 114, 116 

 Alcoholism, 71, 117, 243 



cause of sterility, stillbirths, mal- 

 formation, dwarfs, 210, 212, 236 



induction effect on rotifers, 236 



influence on germ cells, 210 

 Alkaptonuria, 117 



Alpine plants, non inheritance of ac- 

 quired characters, 234 

 "Alternative" inheritance, 73 

 Amalgamation of races, 284 

 American men of science, families 

 of, 293 



Amphiaster, 17 



AMPHIOXUS, cleavage and differen- 

 tiation, 142 



cleavage and gastrulation, 22 

 isolated cleavage cells, 214 



Ancestors, number of, 77, 78 



Ancestry, pride of, 290 



ANCYRACANTHUS, oogenesis, 153 

 spermatogenesis, 152 



Andalusian fowl, Blue, 105 



Anencephaly, 221 



Animal pole of egg, n, 190 



Annelid type of egg, 796 



Ants and bees, 222, 297, 321 



Artificial limitation of families,' 293, 

 295 



Artificial parthenogenesis, 134, 169, 

 213 



ARTIFICIAL SELECTION, 254 



chief factor in production of do- 

 mestic races, 254, 275 

 creates nothing, 254-260 

 isolates pure lines, 254-257 

 lacking, 278 



ASCARIS, fertilization of, 137 

 "germ track," 145, 149 

 sex differentiation in, 760 



Ascidian egg, 140, 143, 146, 147, 796, 

 216, 217, 218 



Aster, 17 



ASTERIAS, fertilization of, 12 



Astral radiations, 17 



Atavism, 73, 81 



ATHENS, 277 



Athletes, prize, 283 



Athletics, educational value of, 318 



ATTICA, illustrious men of, 276, 277 



Automaton, 309, 310 



Backbone, development of, 23 



