624 
Monocystis- 
Monogenea 
Monotremata 
Morphology 
Morula - 
Moths 
Mud fishes 
Miillerian duct 
Muscle - 
Muscular tissue 
Mussel, freshwater 
Mustelidze 
Myomeres 
Myotomes 
Myriapoda - 
Myrmecobius 
Myrmecophagidze 
Mystacoceti 
Myxine 
Myxinoidei 
NNARCOMEDUSE - 
Narwhal 
Nasal capsule 
Natural selection 
Nauplius 
Nautilus 
Nekton 
Nematocysts 
Nematoda - 
Nemathelminthes 
Neornithes - 
Neogoea - : : 
" Mammals of - 
Nephrops 
Nereis 
Nerve tissue 
Nerves, Cranial, 
brata 
Nervous system 
Neuropodium 
Neuroptera 
Newts 
Nictitating 
eye 
Non-calcearea- 
of Verte- 
of 
membrane 
Notochord, Origin of 
‘i Sheath of - 
Notogcea 
" Mammals of 
INDEX. 
PAGE 
102 | Notopodium 
149 | Notoryctes 
492 | Nucleus” - 
22 | Nudibranchs 
50 | Nummulites 
253 
439 | OBELIA 
426 | Octopus 
16 | Oculomotor nerve 
34 | Odontoceti - - 
269 | Odontophore of Cephatopeds 
583 u of Snail - 
300 | Olfactory lobes 
424 n Nerves - 
245 | Oligocheeta 
502 | Omentum 
558 | Oniscus 
579 | Ontogeny 
309 | Ooze, Atlantic 
434 | Operculum of Teleostei 
Ophidia 
133 | Ophiuroidea 
579 | Opisthoccelous 
415 | Opossums 
82 | Optic lobes 
241 nn nerves 
285 «  thalami 
39°| Orang 
114 | Organs 
155 " origin of 
155 » rudimentary 
449 | Oriental region - 
63 1" Mammals of 
597 | Ornithorhynchus 
204 | Orthoptera - 
239 | Orycteropus 
304 | Osculum 
Osphradium of Mollasea 
408 | Ossicles of ear 
19 | Ostracoda 
239 | Ostrich 
254 | Otaria 
440 | Otocysts 
Otter - - 
360 | Oviducal gland of skate 
109 | Oviduct of Vertebrata 
418 | Ovotestis of snail 
413 | Ovum, the - 
63 maturation of the 
595 | Oyster 
