54° 



INDEX 



(Ecophylla smaragdina, iv 115- 

 CEdemla fusci, i 177. |ii6. 



— nigra, i 177. 



CEdicnemus scolopax. i 169; 111471. 



CEstridse, iv 191. 



(Estrus ovis, 1 358; iv 191. 



Ogle. Iv 91. 



Oil-Birds, 11 188. [454. 



Oil-gland, of birds, i 140: ill 56-57, 



Okapi, 11 170-171 (lllust.); Hi 191. 

 Okapia Johnstonl. See Okapl. 

 "Old-man's beard", 1 372. 

 Olfactory cells, i 55-56; iv 31-32 



— nerves, 1 55-56 (lllust.). [illlust.i, 



Ollgochaeta, i 429, 430-431; 11 1.50; 



111 227, jOo-361; iv 199-200. 



Oligoneurla, 11 466. 



Oliva. See Olive-Shells. 



Olivella biplicata, Iv 324. 

 Olive-Shells, i 321 lillust.); ill 218. 



Olm, 1 249 (lllust.); li 457; Hi 48. 

 Omasum, 11 169. See also Digestive 

 organs of mainmals, herbivorous. 



Ommatidliim, iv 43. 



Onager, 1 107. 



Oncaea venusta, iv 452. 



Onchidium, li 330; ui 414, 415 



(Lllust.), 435. 



Oniscus murarius, i 415; 11 222. 

 Ontogeny, ui 335. 

 Onupliis conchUega, 11 339. 

 Opelet, i 476. [358-359- 



Operculum, annehds, 11 258, 339; ill 



— arachnids, i 386. 



— fishes. See GUI-cover. 



— king-crab, 11 406. [Ill 415-416. 



— molluscs, i 319; li 336 (lllust ), 460; 



— moss-piilypes, 11 3^9. 



Ophidla, 1 203, 227-236 

 Ophidiaster dlplex. 111 329 (lllust ). 

 Ophiocephalus, 11 451. 



OphiurOldea, 1 454. See also Brittle- 

 Stars. [34, 35-36. 

 Opisthobranchia, 1 317, 324-326; ill 

 Oplstbocomus cristatus. 111 472- 



473; Iv 431. 



Opisthoteutliis, HI 33 (lllust.). 



Opossum, Azara's, ill 480 (lllust ). 

 common, 1 69, 138; ill 260 lillust.'. 



— mouse, ill 479. 



— water, in 70 (lllust.). 

 Opossums, il 42, 180, iSi, 234, 343: 



111 255, 260. 478. 



Opossum-Shrimps, 1 410, 412-413 



(lllust. i; Hi 365; Iv 36. 

 Optic cup, iv 46-47. 



— lobes, i 149-150, 203: Iv 21-22. 



— nerves, 1 58, r49, 151; iv 47. 



— tracts, 1 149. 



— \eslcle, Iv 46. 



Opuntia coccinelUfera, Iv 260. 

 Oral hood. 1 294. 



Oral papilla, 1 399. [160. 161, 494 

 Orang-utan, i 72 (lllust.); H 349; Hi 

 Orbits, i 57, 71. So. 

 Orca gladiator, H 27; 111 8s. 

 Orchids, Iv 74-75, 86-88 (lllu.st.). 

 Orcynus thynnus, iv 270, 381. 

 Oreotragus saltator, Iv 142. 

 Organic selection, Iv 492. 

 Oriental Kegion, Iv 413, 414, 424- 

 Oriole, golden, i 155-156. [426. 



Orioles, i 155-156; il 309-311 (lllust.) 



OriolUS declpiens, il 310-311. 



— galbtila, i 155. 



Ormer, 1 307-311 (lllust.), 322-323; 11 

 393-394; Hi 412; iv 35. 



Ornlthopoda, iv 469-470. 

 Ornithoptera, i 362. 

 Ornithorhynchus paradoxus, 1 



70; H 44; Hi 69-70. 475, 477-478; Iv 

 211, 212, 481-482. 



Orthagorisous mola, iv 448. 

 Orthoptera, 1 351, 380-383; 11 116- 

 118, 213, 250, 299, 315-316, 327, 359; 



HI 176-177, 377-380: iv 356-357. 



— leaping, 1 380, 381-383. 



— running, i 380-381. 



Orthotomus sutorlus, Hi 459, 460. 



Orycteropus capeneis, 1 136, 137; 



Oryzorictes, ii 33. (il 42. 



Osborn, Iv 492. 



Oscinls frit, iv 351. 



Oseulum, i 484, 486; Hi 325, 326, 342. 



Osgood, Fletcher, iv 353. 



Osmerus eperlanus. 1 282; Iv 276. 

 Osmia papaveris, Hi 391. 

 Osphradium, i 310-311. 

 Osprey. 1 175; 11 48; iv6i. 

 Ossicles, 1 29. 



— auditory, i 57. 



Osteoglossidse, Iv 433. 

 Ostracion quadricornis, i 278; H 



334; Iv 340. 



Ostracoda, 1 410, 419-420; 11 255, 



405-406: Hi 25, 364. 

 Ostracodermata, iv 463 (lllust.). 

 Ostrea, 111 409. 



— angulata, iv 288. 



— edtills, 1 338; Hi 406; iv 288. 



— Vlrginlana, Hi 405; iv 288. 

 Ostrich, African, i 187, 188 (lllust 



li 367-36S; ill 130, 153, 449; iv 250, 

 251. [449 



— .American, i 1S7, 18S; ill 130, 153 



Ostriches, 1 i88; 11 354; 111 12S- 



153, 186; Iv 146. 

 Otarla stelleri, i 98. 



— iirslna. Hi 492; Iv 304-307. 

 Otaridae. See Sea- Lions. 

 Otis australls, iv 150, 



— tarda, i 170; 11 241-242; iv 150, 377. 



— tetrax. Iv 377. 



Otocorys alpestris, 1 156. 

 Otocysts, iv 33, 34, 35 (lllust.), 36, 



37, 38. 

 Otolicnus, il 320 

 Otoliths, iv 33, 34, 35, 36. 

 Otter, common, i 98; 11 22; ill 76. 



— feline, 11 23. 



— sea, li 23-24; Hi 77 (lllust.). 

 Otters, i 98; ii 22-24; Hi 76-77, 492. 

 Oval window, 1 57. 



Ovary, Hi 340 ; and see Eggs and 

 Egg-producing organs. 



Oven-Birds, ill 461 (lllust ), 464. 



Ovlbos moschatus, 1 115. 



Ovicells, iv 104. 



Ovipositor, i 370, 372, 377, 382, 383; 

 11 203, 204 (lllust. \ 205; Hi 379, 380 

 (lllust.), 381, 386-387 (lllust,), 3S8 

 (lllust.); iv 194, 195 (lllust.). 



Ovls argall. 111 186-187, 248. 



— arics, il 168; iv 226-229. 



— Canadensis, i 116. 



— montana, Hi 187. 



— niuslmon, i 116; iv 227. 



— tragelaphus, iv 227. 

 Ovules, iv 85. 



OVUlura angulosum, iv 323. 



— patulum, 11 285. 



— iinlpllcatum, 11 285. 



Ovum (pi. Ova), ill 335-337- See 

 also Egg-cells. 



Owl, barn-, i 165; iv 327-328. 



— burrowing, i 166: iv 135. 



— fish, i 166. 



— great-honied or eagle, 1 166. 



— hawk, i 166: ii 319 (lllust). 



— long-eared, i 165. 



— pigmy, i 166. 



— short-eared, 1 165. 



— snowy, i 165; ii 279, 



— tawny or wood-, i 165. 



Owls, i 152, 165-166: ii 46, 322; Iv 



327-328. 

 Ox-bot, i 358. 

 Oxen (and see Cattle), i 109, 113-115; 



il 167-169, 225, 352: iv 224-225. 



— European, i 114: iv 225. 



— Hungarian, iv 224 (lllust.). 

 Ox-Fly, ii 120. 

 Oxidation, il 377- 

 Ox-Peckers, ii 62-63 (illust.). 

 Ox-Warble Flies, iv 349 (lllust.). 

 Oxyethlra oostalis, in 385 (lllust), 



386. [420: iv 65-68, 76. 



Oxygen, i 33, 45: ii 377-380, 382, 383, 

 Oxythyrea funesta, iv 82-83. 

 Oxytricha, ill 88 illlust.). 

 Oxyuiis vermicularis, iv 343. 

 Oyster (and see Oysters) : 



— American, ill 405; iv 288. 



— common, i 338: Hi 406. 



— "flat", iv 2S8. 



— pearl-, iv 205, 39S (lllust.). 



— Portuguese, iv 288. [204. 

 Oysters, 1 338: 11 398: Hi 409: iv 2SS- 



— thorny, il 336; HI 409. 



Oyster-catcher, 1 169: ii 67-68. 

 Oyster -culture, i 15 : iv 2BS-294 

 Ozothallia, H 198. [(iiiust.) 



Faca, 1 133-134. I324. 



Pachydesma crassatelloides, i> 

 Pachyomis elephantopus, Iv 475, 



476 lillust.). 



Pacinian bodies, iv 27 (illust.). 



Packard, Hi 165. 



Packing cells, 1 471. 



Padus humilis, iv 430. [138, 403. 



Pagurus Bernhardus, i 412; H 137- 



Palsearctlc Region, iv 412, 413, 414- 



Pal^mon, iv 35, 36. [41S. 



— Jamaicensls, ii 137. 



— serratus, 1 412; ii 137, 292, 403; 111 

 169; iv 298, 299-300, 



Palseodiscus, iv 459. 

 Palaeozoic epoch, iv 457, 458-464 

 Palingenia horaria, i 375 (illust. ). 

 Palinurus vulgaris, i 412: 11 137, 



279, 338; ill 36S; iv 37. 

 Palisade-Worms, iv 343, 362 ; and 



see Strongyles. 



Pallas, 11 140. [334. 



Pallial line, of bivalve molluscs, 1 33 1 , 

 Palm, i 24, 30-31. See also Hand. 



Palm-Cat. ii 226-227 (iiiust.), [227. 



Palm-CivetS. Asiatic, H 12-13, 226- 

 Palmer Worm, ii 360. 

 Palm-Thief. See Crab, robber-. 

 Palolo virldls. iv 216-217. 

 Palolo Worm, iv 216-217. 

 Palp, 1 346. See also Wouth-parts. 

 Paludicella, Hi 331 (illust). 

 Paludlna vivipara, i 320; ill 414; 



Iv 17-18. 



Palustra, Hi 401. 



