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 erythrocjphaliis, 228 ; 



formicivorus, 229. 



Melanerpes formicivorus bairdii 

 Melanoplus spretus (illus.), 267. 



(illus.), 294. 



Meleagris gallopava, 2.35. 

 Membracidae (illus.), 367. 

 Mesohippus, 431. 

 Metamorphosis, 270. 

 Metazoa, 22. 

 Millipeds, 127. 

 Mimicry, 350, 365, 369. 

 Mind, 402. 



Mining-bee, nest 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 aiiditory hairs (illus.), 382. 

 Mother Carey's chickens, 220, 

 Moths, 141. 



Muridse, 17. 



Mus muscultts, 241. 



Mussels, 89 ; edible (illus.), 94 



Mustelidce, 248. 



Myocetes, 250. 



Myriapoda, 110, 127. 



My sis americana (illus.), 116. 



Mytilus edulis (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 nyciea, 226. 



Oceanites oceanicus, 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. 



OBtracoderm (illus.), 425. 

 Ostriches, 217 ; African or two-toed 



(illus.), 218. 

 Ovis canadensis, 246. 

 Owls, 226. 

 Oxygen, 5. 



Pagurus (illns.), 338. 



Pagurus bernhardus (illus.), 119t 



Paleontology, 15, 424. 



Palinurus, 118. 



Pallas's murres (illus.), 330. 



Palolo worm (illus.), 408. 



