374 
Muride, 25, 338. 
Musca, 21, 171. 
Muscicapide, 301. 
Musquash, 337, 338. 
Mussel, 21. 
Mustelide, 25, 334. 
Mya, 194, 197. 
Mycetes, 25, 343. 
Myoxide, 25, 388. 
Myriapoda, 20, 137; general characters 
of, 155, 156. 
Myrmecophaga, 24, 319. 
Myrmeleo, 163. 
Myrmica, 175. 
Mytilus, 21. 
Myxine, 22, 238. 
Myxinide, 238. 
Myxinoids, 235, 238, 239. 
Naidide, 132, 133. 
Nais, 19. 
Naja, 265, 268. 
Narwhal, 322. 
Nasua, 334. 
Natatores, 23, 288, 289; general charac- 
ters of, 290, et seq. 
Nautiloid shells (Foraminifera), 38. 
Nautilus, Pearly, 22, 205, 207, 212; 
Paper, 22, 207, 209, 210, 211. 
Nectocalyces, 75, 76, 77, 80. 
Nematoda, 19,118; general characters 
of, 124, 
Nemertidce, 19, 123. 
Nereis, 19, 184. 
Nervures, 157. 
Neuroptera, 21, 168. 
Newt, 226, 247, 251. 
Noctiluca, 52. 
Nodosaria, 17, 36, 38, £3. 
Notommata, 19. 
Nucleolus of Paramecium, 49. 
Nucleus of Paramecium, 49. 
Nudibranchiata, 2y1. 
Numenius, 294. 
Numida, 297. 
Nummulites, 39, 40. 
Nummulitic Limestone, 40. 
Nycticebide, 342. 
OcErANIC Hydrozoa, 75, et seq. 
Octopoda, 206, et seq. 
Octopus, 22, 208, 209, 211. 
Odontoceti, 322. 
Odontophore, of Gasteropoda, 198. 
Oligochwta, 19, 181; general characters 
of, 132. 
Omnivora (Ungulata), 324. 
Oniscus, 20, 143. 
Operculum (of Molluscs), 198 
Ophidia, 23, 257, 26u ; general charac- 
ters of, 264, et seq. 
Ophiocoma, 19, 110, 111. 
Ophiomorpha, 23, 248. 
Ophiosaurus, 269, 
Ophiura, 19, 110. 
Ophiuroidea, 19, 104, 109 ; general char- 
acters of, 110, e€ seq. 
INDEX. 
Opossum, 24, 312, 316, 317. 
Orang-outang, 25, 344. 
Organ-pipe Coral, 18, 98. 
Organs of the mouth of Insects, 158, 159. 
Oriola, 24. 
Ornithorhynchus, 24, 314, 315. 
Orthoceras, 213, 
Orthoptera, 21, 167. 
Ortyx, 297. 
Orycteropus, 319. 
Oscula of Sponges, 44. 
Osteolepis, 245. 
Ostraciontide, 262. 
Ostracoda, 20, 146. 
Ostrea, 21. 
Ostrich, 24, 279, 288, 289, 294, 295. 
Otide, 294. 
Otter, 334. 
Ovarian vesicles of Sertularida, 73. 
Ovibos, 329. 
Ovid, 25, 329. 
Ovipositor, 158. 
Ovis, 329. 
Owls, 24, 287, 304. 
Oxen, 25, 324, 328, 329. 
Oxyuris, 124. 
Oyster, 21. 
Oyster-catcher, 294. 
Paca, 337. 
Paddle-fish, 22, 244. 
Paguridc, 20, 141. 
Pallial line, 195, 196. 
Pallium (see Mantle). 
Pangolin, 319. 
Panther, 335. 
Paper Nautilus, 205, 207, 209, 210, 211. 
Paramecium, 17, 48, 53; reproduction 
of, 49 ; nucleus and nucleolus, id. 
Parapodia, 130. 
Parrakeets, 24, 299. 
Parrots, 24, 289, 299. 
Partridge, 24, 297. 
Passerine Birds, 300. 
Patagium, 339. 
Patella, 22. 
Pauropus, 20, 156. 
Pavo, 297. 
Peafowl, 297. 
Pearly Nautilus, 205, 207, 212. 
Peccary, 25, 324, 325, 
Pecten, 21, 197. 
Pedicellarie of Echinus, 106; of Star- 
fish, 110. 
Pediculus, 20. 
Pedipalpi, 20, 152. 
Pelagia, 18. 
Pelagide, 18. 
Pelias, 268. 
Pelicanus, 285, 289, 292. 
Peltogaster, 20, 148. 
Penguin, 23, 280, 291. 
Pennatula, 18, 98. 
Pentacrinus, 18. 
“Pentatoma, 21, 166. 
Perameles, 317. 
| Peranema, 17, 48, 93. 
