INDEX 



455 



242 ; hoofed, 245 ; flesh-eating, 



246. 



Mallophaga, 338. 

 Mammalian age, 436. 

 Manatee (illus.), 238. 

 Man, 252, 429. 

 Man-like mammals, 250. 

 Mantis (illus.), 293. 

 Marine worms (illus.), 76 ; head of 



(illus.), 77; common (illus.), 78; 



sedentary tube-dwelling (illus.), 



79. 



Marsupialia, 239. 



Mastodon americanus (illus.), 418. 

 Mayflies, 134. 



Megaptera versabilis (illus.), 243. 

 Megascops asio, 226. 

 Melanerpes erythrocephalus, 228 ; 



formicivorus, 229. 



Melanerpes formicivorus bairdii 

 Melanoplus spretus (illus.), 267. 



(illus.), 294. 



Meleagris gallop av a, 225. 

 Membracidae (illus.), 367. 

 Mesohippns, 431. 

 Metamorphosis, 270. 

 Metazoa, 22. 

 Millipeds, 127. 

 Mimicry, 350, 365, 369. 

 Mind, 402. 



Mining-bee, neet of (illus.), 325. 

 Miohippus, 431. 

 Mniotiltidce, 231. 

 Mole cricket (illus.), 311. 

 Mollusca, 19. 

 Mollusk, auditory organ of (illus.), 



380. 



Mollusks, 89. 

 Monarch butterfly (illus.), 141, 268, 



366. 



Monkeys, 250 (illus.), 251, 443. 

 Monotremes, 305. 

 Morphology, 15. 

 Mosquito, 138 ; metamorphosis of 



(illus.), 269 ; head of (illus.), 293 ; 



young stages of (illus.), 312 ; show- 

 ing auditory hairs (illus.), 382. 

 Mother Carey's chickens, 220. 

 Moths, 141. 



Muridae, 17. 



Mus musculus, 241. 



Mussels, 89 ; edible (illus.), 94. 



Mustelidce, 248. 



Myocetes, 250. 



Myriapoda, 110, 127. 



Mysis americana (illus.), 116. 



Mytilus edulls (illus.), 94. 



Nematodes, 67. 



Neotropical realm, 443. 



Nereis (illus.), 76. 



Nerve cells and fibers, 387. 



Nettle-cells (illus.), 44, 



Neuroptera, 135. 



Newts, 186. 



Night-hawk (illus.), 229. 



Nomeus, 336. 



Nomeus gronovii (illus.), 337. 



North temperate realm, 442. 



Nudibranchs (illus., 100), 99. 



Nyctea nyctea, 226. 



Oceanites oceanicns, 220. 

 Octopus (illus., 105), 106. 

 Onychophora, 109, 127. 

 Opossum (illus.), 239. 

 Opossum-shrimp (illus.), 116. 

 Orange scale of California (illus.), 



347. 



Orchard pests, 413. 

 Ornithorhynchus, 237. 

 Orohippus, 431. 

 Orthoptera, 133. 

 Osteolepis macrolepidotus (illus.), 



426. 



Ostracoderm (illus.), 425. 

 Ostriches, 217; African or two-toed 



(illus.), 218. 

 Ovis canadensis, 246. 

 Owls, 226. 

 Oxygen, 5. 



Pagurus (illns.), 338. 



Pagurus bernhardus (illus.), 119. 



Paleontology, 15, 424. 



Palinurus, 118. 



Pallas's murres (illus.), 330. 



Palolo worm (illus.), 408. 



