INDEX. 



305 



Page 



Nasal cartilafjes 153 



Nasal septum mammals 153 



Nasal cavities of Dipnoi .... 78 



Nectiirwi 80 



Negative characters in classi- 

 fication 9 



NepheUs 222 



Nephridia of earthworm .... 219 



moUusca 228, 231 



homologues of, in 



Arthropods 220 



Brachiopods 238 



Nervous system of crayfish . . 195 



spider 203 



insects 207 



Lamellibranchs 229 



Central, of Vertebrates . . 30 



Nests of fishes 63 



birds 287 



Nematdmlnthes 223 



Nematodes 224 



Nematognatld 56 



Neviertlnl 225 



Neuroptera 212- 214 



Neuro-epithelium, auditory. . 38 



Neural arch 18 



Nerves afferent and effereiitiO, 32 



function of 32 



Nerve-cells 32 



Nettling-organs 245 



New World Monkeys 188 



Newt 91 



NoctUuca 207, 208 



Nomenclature 51, 55 



Notochord 18 



Notonecta 213 



Notum 206 



Noturus 55 



Nucleus of cells 16 



Infusoria 259 



Niimenins 139 



Numida 140 



Niimmulitic Limestone 279 



Nutritive organs 265 



Nuthatch 141 



Nyctale 140 



Nycticorax 139 



Nyctipithecus 189 



Ohelaria 246 



Ocean Currents, Effects of . . . 282 



Page 



Ocellus 203, 205, 207 



Occipital Condyles 126 



Octop^is 2/i5 



Odontoid Process 126 



Odd-Toed Ungulates 171 



Olifjochaeta 220 



Oliva. 235 



Olfactory Organs, Lamelli- 

 branchs 2.30 



Olfactory Bulbs and Tracts of 



Catfish 30 



Olfactory Organ 34 



Mammals 1 52 



Crayfish 165 



Ommatidium 195 



Onychodromus 259 



Onchorhynchus 59 



Oniscus 198 



Ontogeny 264 



Opalina 259 



Operculum 25 



Of Gastropods 234 



Opisthocoelous 75 



Ophiosaurus 110 



Ophklia Ill 



Ophiothrix 244 



Opliiuroldea 243 



Opisthobranchkifa 235 



Opposable Digits of Primates. 186 



Opossum -Shrimps 197 



Opossum 161 



Optic Lobes 31 , 152 



Op>hiholiis 114 



Orang-utan 189 



Orbitosphenoid 23 



Orcynus 67 



Orca 165 



Organization 253 



Oriental Region 287 



Oriole 141 



Ornithopoda 118 



Ornithorhynchun 167 



Ornithological 'I'erms 122 



Otoliths 37, 196 



Orthoptera 209 



Genuina 211 



Orycteropus 163 



Otter 179 



Oscines 141 



Osculum of Sponge 250 



