INDEX 



495 



Neuro-epithelium 356 



Neuro-fibrillae 85 



Neuroglia 258 



Neuromasts 263 



Neuromeres 407 



Neuron 87 



Neuropore 406 



Nodes of Ranvier 88 



Nostrils. See Naris 



Notochord, Rana 116, 390, Scyllium 



205, 217, Amphioxus 383 

 Nuclear division, indirect 130 

 Nucleo-centrosome 129 

 Nucleolus 363 

 Nucleoplasm 359 

 Nucleus u, 22 ; Cleavage 377 ; 



Conjugation 131 ; Fertilisation 



377, Plasmodium 145 ; Migratory 



131 ; Stationary 131 

 Number, diploid 367, haploid 368, 



reduced 368, somatic 367 



Obelia 159 



Ocellus 164 



Odontoblast 213 



(Enothera lamarckiana 469 



(Esophagus, Rana 18, Lumbricus 173 



CEstrus 409 



Oken 445 



Olfactory organ, Rana 15, 91, Lepus 

 338 ; Development of 433 



Omenta 47 



Omentum, duodenal-hepatic 46, 

 gastro-duodenal 46, gastro-hepatic, 

 Rana 47, Scyllium 233 ; gastro- 

 intestinal 233, gastro-splenic, 

 Scyllium 233, Lepus 324, 306 



Omphalopleure 436 



Onchosphere 199 



Oocyst 145 



Oocyte 157, primary 371, secondary 



373 



Oogenesis 371 



Oogonia 368, 371, Hydra 157, Lum- 

 bricus 184 



Ookinete 145 



Oospore 105 



Operculum 107 



Ophidia 477 



Opsonic index 70 



Ora serrata 94 



Oral cone 148, evagination 393, 

 surface 150, valve 228 



Orbits 15, 27 



Order 115 



Organs 23, 355, of Jacobson 303, 



segmental 178 

 " Origin of Species "457 

 Ornithischia 478, 479 

 Ornithorhynchus 450 

 Orohippus 452, 453 

 Osmosis 53 



Ossicles, auditory 267 

 Ossa uteri 324 

 Ossification 36 

 Osteoblasts 36 

 Osteoclasts 37 



Ova 20, ovarian 371, primordial 184 

 Ovaries, Rana 20, T. solium 197, 



Lepus 323 

 Oviducal funnel, Rana 71, Lumbricus 



184, Scyllium 249 

 Oviducal gland 249 

 Oviduct, Rana 20, 71, Lepus 323 

 Oviparous 205 

 Ovisac, Rana 71, Lumbricus 184, 



Scyllium 249 

 Ovo-viviparous 205 

 Ovulation 374 



Ovum 73, 313, fertilised 105 

 Oxidation 22 

 Oxyhaemoglobin 69 

 Oxyntic cells 50 



Palate 267, 302, hard 267, soft 267 

 Pancreas, Rana 18, 47, 51, Lepus 306 

 Papillae, circumvallate 303, Dermal 



213, foliatae 302, taste 302, urinary 



211, urogenital2ii 

 Parahippus 453 

 Parallelism in Evolution 484 

 Paramcecium 125 

 Parasites 135 

 Pars, ciliaris retinas 94, glandularis 



325, intermedium 325, nervalis 



325 



Parthenogenesis 368, artificial 378 

 Pearson, Karl 459, 460 

 Pectoral girdle 17 

 Pelvis of Kidney 320 

 Pelycosauria 474 

 Penis 270, 322 

 Periblast 396, central 398, marginal 



398 



Pericardial cavity 17, space 315 

 Pericardium, Rana 17, Lepus 314 

 Perilymph, Rana 99, Chick 433 

 Perimysium 41 

 Perineal pouches 270 

 Perineum 267 

 Perineurium 89 

 Periosteum 36 



