686 



INDEX. 



Neurenteric canal, 502, 532 

 Neurites, 94 

 Neuropodiuni, 308, 312 

 Neuropore, 503, 532 

 Neuroptera, 481 

 Neverita, 380 

 New Zealand, 177 

 Nictitating membrane, 541 

 Nidamental glands, 392 

 Night hawks, 616 

 Nipple, 619 

 Nirmus, 479 

 Nocliluca, 201, 203 

 Noctuina, 495 

 Nodes of Ranvier, 96 

 Nomarthra, 636 

 Nomenclature, binomial, 10 

 Non-Ruminantia, 641 

 Nosema, 218 

 Nothria, 313 

 Notochord, 501, 515 

 Notochordal sheath, 516 

 Notodelphys, 585 

 Notodelphidte, 422 

 NotogEea, 176 

 NotonectidiE, 489 

 Notopodium, 308, 312 

 Nototrema, 585 

 Notum, 462 

 Nuclear plate, 595 

 Nuclear fragmentation, 70 

 Nuclear spindle, 68 

 Nuclear substance, 65 

 Nuclein, 65 

 Nucleolus, 66 

 Nucleus, 58, 64 

 Nucleus, cleavage, 149 

 Nucleus, egg, 146 

 Nucleus in fertilization, 149 

 Nucleus of Salpa, 511 

 Nucleus, significance of, 67 

 Nucleus, somatic, 208 

 Nucleus, sperm, 149 

 Nucleus, substance of, 65 

 Nucleus, structure of, 65 

 Nucula, 365, 367 

 Nuculidre, 367 

 Nuda, 264 



Nudibranchia, 382 



Nummulites, 198 



Nurse, 144 



Nutrition and reproduction, 64 



Nyctotherus, 210 



Nymphon, 456 



Obelia, 240, 242 



Obisium, 450 



Obturator foramen, 622 



Occipitalia, 521 



Occipital bone, 521, 619 



Occiput, 462 



Ocellatae, 239 



Ocellus, 129, 403 



Ocneria, 119, 495 



Octocoralla, 258 



Octopoda, 395 



Octopodids, 395 



Octopus, 384, 390, 394, 395 



Ocular plate, 335 



Oculina, 261 



Oculomotor nerve, 536 



Odonata. 479 



Odontoholcae, 612 



Odontophore, 373 



Odontormce, 612 



Odontornithes, 612 



QLcanthus, 481 



CEcology, 457, 164 



GLdipoda, 481 



(didogonium. 173 



tEgopsida, 394 



Oesophageal ring, 124 



(Esophagus, 106, 546 



CEstridx, 493 



(Estrus, 193 



Oikopleura, 506, 507 



Oil bottle, 4S4 



Olfactory organs, 126 



Olfactory organs of vertebrates, 53S 



Olfactory lobe, 534 



Olfactory nerve, 536 



Oligocene, 181 



Oligochaetce, 314 



Oligosoma, 599 



Oligotrochus, 349 



Olividce, 380 



