INDEX. 



713 



Morphology, 5 



Morula, 43 



Mosasaurus maximus, 500 



Mosquito. 357 



Moths, 358 



Mound bird, 546 



Mouse, 586 



Mucous canal of fishes, 442 



Mud dauber, 383 



Mud fish, 432 



PUPPY. 478 



sun risk, 443 

 Mullet, 443 

 Mus, 586 



Musca domestica, 355 

 Musical fishes, 44:3 

 Music of mammals, 569 

 Mussa, 80 

 Mussel, edible, 248 



development of, 254 

 Mustek foina, 617 

 3Iustelus canis. 420 



kevis, 420 



vulgaris, 420 

 Jttuzir, 604 

 Mya arenarin, 222 

 Mygale avicularia, 363 



Hentzii, 363 

 Myliobatis, 416. 424 



frernenvillii, 422 

 Mylodon, 579 

 Myriopoda, 336. 365 

 3Iyriotrochus Rinkii, 134 

 Myriozoum subgracile, 180 

 My sis, 293 

 Mysticete, 592 

 Mytilus edulis, 228 

 Myxine, 409 



NAJA, 499 



Nanemys guttatus, 510 

 Narwhale, 594 

 Nasua, 615 

 Uatatores, 544 



Natica heros, anatomy of, 241 

 Natrix torquata, 495 

 Nauplius, 274 

 Nautilus pompilius, 260 

 Nc-balia, 291 



bipes, 292 



Necturus lateral is, 478 

 Nematelmintb.es, development of, 

 164 



structure of, 163, 175 

 Nematodes, 167, 175 

 Nematogeue, 141 

 Nemertian worms, 196 

 Nemmtiua, development of, 197 



structure of, 196, 199 

 Neochanna, 452 

 Nephila plumipes, 343 

 Nereis virens, anatomy of, 211 

 Nervous system. 608 

 Nervous system of ctenophores, 

 92 



insects, 317 



hydrozoa, 62, 65 

 Nests of birds, 536 

 Neuroptera, 349 

 Neurula stage of leeches, 228 



worms, 230 

 Nightbawk, 551 

 Noctiluca miliaris. 33 

 Noises produced by fishes, 442, 



443 



Notacanthus, 446 

 Notochord of ascidians, 396 

 Notommata, 177 

 Nototrema marsupiatum, 485 

 Nudibranch molluscs, 245 

 Numerius longirostris, 545 

 Nummulites, 25 

 Nurse of trematode worms, 149 

 Nyctea nivea, 549 



OCULINA, 80 

 Octacnemus bythius, 292 

 Octopod cephalopoda, 260 



