INDEX 



503 



Minnows, 318. 



Mites, 117. 



Moccasin snalvo, .366. 



Mocking-bird, 412. 



Mole, 445. 



Mole-crabs, 140. 



Mole-cricket, 21. 



Molluaca, 210 ; anatomy of, 198 ; mu.s- 

 oulature of, 206 ; nervous system 

 of, 206 ; organs of circulation, 203 ; 

 excretion, 204 ; nutrition, 200 ; 

 reproduction, 204 ; physiology of, 

 19S ; sense-organs of, 206. 



Molt, 16 ; of lobsters, 136. 



Monarch, 37, 40. 



Mongoose, 446. 



Monkeys, 450. 



Monotrcmes, 439. 



Morone, 311. 



Morphological Zoology, 463. 



Morula, 457. 



Mosquitoes, 84. 



Moth, 29. 



Mother-of-pearl, 236. 



Mourning-cloak, 40. 



Mouse, 420, 446. 



Mud-eel, 338. 



Mud-puppy, 339. 



Mud-snail, 218. 



Mud-wasps, 52. 



Mus, 430. 



Muscidaj, 80. 



Muscles, 2. 



Musculature, of annelids, 167; birds, 

 388 ; cricket, 9 ; cchinodcrms, 244 ; 

 fish, 308 ; frog, 335 ; gasteropods, 

 206 ; lobster, 125 ; mammals, 438 ; 

 turtles, 3.55. 



Muskallunge, 319. 



Musk-turtle, 364. 



Mussels, 234 ; pearl, 235. 



Mutation theory, 470. 



Mutations, 428. 



Mya arenaria, 231 



Myida;, 230, 231. 



Myriapoda, 92, 97. 



Mytilidae, 230, 234. 



N 



Nais, 173. 

 Nassa, 218. 

 Natatores, 392. 

 Natica, 217. 

 Natural selection, 37. 

 Nautilus, pearly, 221. 

 Necturus, 339, 456. 

 Nematocera, 82. 



Nemertini, 190. 



Nephelis, 175. 



Nereis, 162, 164, 182; food of, 186. 



Nerve, 2 ; chord, 289. 



Nervous system, of birds, 389 

 cricket, 9 ; echinoderms, 245 

 fish, 308 ; frog, 336 ; loljster, 126 

 mammals, 439 ; moUusca, 206 

 lizard, 355. 



Nest, of barn swallow, 409 ; of chim- 

 ney swift, 402 ; of pewee, 403. 



Nettle animals, 264. 



Neuroptera, 27. 



Newt, 326, 342 ; transformation, 

 326. 



Nighthawk, 402. 



Noctuida-, 45. 



Nfjrway rat, migrations of, 431. 



Nucleus, 288, 469. 



Nuthatch, 413. 



Nutrition, functions and organs of, 5 ; 

 in echinoderms, 241; fish, 305; 

 frog, 331 ; lol:)ster, 122 ; lizard, 

 352 ; mammals, 434. 



Nymphs, 40. 



O 



Obclia, 267, 278. 



Odd-toed, hoofed mammals, 445. 



Odonata, 25. 



Oligochsetae, 172 ; terrestrial, 174. 



Omnivorous, 17. 



Oniscus, 145. 



Operculum, annelids, 190 ; fishes, 304. 



Ophidia, .351, 365. 



Ophiuoridea, 253. 



Opisthobranchs, 212, 220. 



Opossum, 441. 



Oral, 238. 



Orang-utan, 449, 450. 



Orb-weavers, 106. 



Orb-web, structure, 107. 



OrlMtelarice, 106. 



Orca, 443. 



Orchard oriole, 405. 



Origin of land life, 325. 



Organ-pipe coral, 267. 



Organs, of circulation, in echinoderms, 

 243; fi.sh, 307; frog, 3.33; Mol- 

 lusca, 203 : lizard, 353 ; excretion, 

 in birds, 387 ; echinoderms, 244 ; 

 fish, 307; MoUusca, 204; lizard, 

 354 ; lobster, 122 ; nutrition, in 

 birds, 383 ; echinoderms, 241 ; 

 fish, 305; MoUusca, 200; lizard, 

 352 ; respiration, in birds, 385 ; 

 echinoderms, 242 ; gasteropods. 



