484 



INDEX 



Merriam, C. H., 117. 

 Metamorphosis, 235; of barnacle 



(illus.), 234; of crab (illus.), 238; 



of Monarch butterfly (illus.), 



235; of silkworm moth (illus.), 



236; of toad (illus.), 237. 

 Micellae of Nageli, 251. 

 Microzymes of Bechamp, 250. 

 Mid-parent of Galton, 165. 

 Mimicry, 421. 

 Mind, 448. 



Mite, itch (illus.), 363. 

 Mitosis, 252; details of, described, 



253. 

 Moenkhaus, 89. 



Molecules, organic, of Buffon, 250. 

 Monkey (illus.), 446. 

 Morgan, 146, 157. 

 Mousefish (illus.), 410. 

 Miiller, F., 408. 

 Mutation, 54, 131, 147, 187; de Vries 



theory of, 114. 

 Mutilations, not inherited, 202. 

 Myrmecophily, 372. 

 Myrmica scahrinodes, nest of (illus.), 



393. 

 Myzostoma glabrum, fertilization of 



egg of (illus.), 267. 



Nageli, 47, 55, 111, 197; theory of 

 protoplasmic structure, 251. 



Narcine brasiliensis (illus.), 334. 



Neo-Darwinism, 197. 



Neo-Lamarckism, 197. 



Newbigin, M. I., 398. 



New Zealand, plagues of, 65. 



Noctiluca, conjugation of (illus.), 

 220. 



Nomeus, commensal life with Phy- 

 salia (illus.), 372. 



Number of young, 225. 



Nyderibia (illus.), 351. 



Octopus (illus.), 40; punctatus 



(illus.), 40. 

 (Enothera Lamarckiana, de Vries' 



work on, 157. 



Oncorhynchus tchaytscha, egg-laying 

 of, 59. 



Ontogeny, 211, 224; factors in, 244; 

 first stages of (illus.), 227. 



Oogenesis, 264. 



Opossum (illus.), 46. 



Opuntia, hybrid seedlings of (illus.), 

 98. 



Orang-utan baby (illus.), 455; 

 skull of, compared with skull of 

 man (illus.), 452; teeth of, com- 

 pared with man (illus.), 454. 



Organisms, geologic age of groups of, 

 299; simplest, 32. 



Organs, vestigial, 174. 



Oriole, Baltimore, diagram of varia- 

 tion in, 137. 



Orioles, distribution and classifica- 

 tion of American, 128. 



Ornithotomus sutorius, nest of (il- 

 lus.), 444. 



Orthogenesis, 113. 



Ortmann, A. E., 108. 



Osborn, H. F., 115, 203. 



Ostracoderm (illus.), 305. 



Ostrich, African (illus.), 45. 



Ovocyte, defined, 264, 



Ovogonium, defined, 264. 



Oxytricha fallax, reacting to cold 

 (illus.), 428. 



Packard, A. S., 197, 297. 



Pagurus bernhardus (illus.), 374. 



Paleontology, 289. 



Palo Alto, stoclc farm of, 103. 



Pandorina sp. (illus.), 35. 



Pangenesis of gemmules of Darwin, 

 250. 



Papilio cresphontes, larva of (illus.), 

 322; chrysalid of (illus.), 409. 



Paramoecium aurelia (illus.), 33; re- 

 production of, 216. 



Parasites, external, 348; facultative, 

 349; internal, 348; obligate, 

 349; permanent, 349; tempo- 

 rary, 349. 



Parasitism, 347. 



