Index. 



447 



Neozoic Age, 46. 



Nepa, 394. 



Nephrops, 355. 



Nephthya, iii. 



Nephthys, 221. 



Nereis, 220. 



Nerine, 222. 



Nerita, 292. 



Neritidffi, 307. 



Neritina, 292, 307. 



Nen'c endings, 23. 



Nervous system of Bryozoa, 227. 

 „ „ ,, Chastognatha, 207 



„ „ „ Echinus, 145. 



,, „ ,, Hirudinea, 129. 



„ „ „ Nemerteans, 157. 



„ „ „ MoUusca, 207, 287 



„ „ „ Insects, 388. 



Neurin, 6. 



Neuroglia, 15. 



Neurobranchiata, 311. 



Neuromuscular cells, 81. 



Neuroptera, 405. 



Nicoletia, 402. 



Nicothoe, 347. 



Nidalia, 117. 



Niphargus, 360. 



Nitzsch, 398. 



Noctilucae, 56. 



Noctua, 411. 



Noctuidae, 411. 



Nodosaria, 54. 



Nonioninidas, 54. 



Nops, 374. 



North America, 43. 



Notarchus, 305. 



Noteus, 198. 



Notoceridae, 160. 



Notodelphys, 347. 



Notochord, 15. 



Notommata. 194. 



Notonecta, 401. 



Nubecularia, 53, 



Nubicula, 287. 



Nucleobranchiata, 294. 



Nucleus, 4, 237. 



Nucleolus, 4, II. 



Nummulites, 52. 



Nutritive organs, 26. 



Nyctalops, 376. 



Nymphon, 364, 370. 



Nymphalidse, 412. 



Obelia, 94. 



Obisium, 376. 

 Occiput, 384. 

 Occlusores, 250. 

 Oceania, 92. 

 Ocelli, 89, 150. 

 Ochnus, 153. 

 Octactinia, 117. 

 Octocotyle, 174. 

 Octomeris, 345. 

 Octopus, 245, 314. 

 Octorchidoe, 95. 

 Octorchis, 95. 

 Oculinidae, 116. 

 Oculininse, 117. 

 Ocypode, 357. 

 Ocyroidae, 109. 

 Odonata, 391. 

 Odontobius, 184. 

 Odontognatha, 288, 312. 

 Odontophore, 287. 

 Odynems, 420. 

 CEcistidae, 197. 

 CEcistes, 197. 

 CEcoid, 32. 

 QLdipoda, 404. 

 CErsted, 161. 

 CErstedia, 162, 

 ffisophagus, 30. 

 Oestrus, 394. 

 Oigopsids, 325. 

 Oikosites, 40. 

 Oiketicus, 384. 

 Oldhamia, 47. 

 Olfactory organs, 339. 

 Oligochjeta, 218. 

 Oligopori, 146. 

 Oliva, 281, 309. 

 Olividae, 309. 

 OUulanus, 186. 

 Ommatidae, 63. 

 Ommastrephes, 314. 

 Ommatoplea, 162. 

 Ommatophores, 286, 297. 

 Omostegite, 353. 

 Onchidium, 290, 295. 

 Onchidoridse, 308. 

 Onchidoris, 305. 

 Onchocerca, 186. 

 Oncholaimus, 184. 

 Oncinolabes, 152. 

 Oniscidae, 362. 

 Oniscus, 362. 

 Onuphis, 220. 

 Onychophora, 205. 



