524 



INDEX 



Diamond-back terrapin, 324. 



Diamond beetle, 219. 



Diamond rattler, 320. 



Diapkerotncra femorata, 204. 



Diaphragm, of Mammalia, 358 ; of sponge, 



55- 

 Diastema, 386. 

 Diastylis stygia, 165. 

 Diatom ooze, 445. 

 Dibranchiata, 255. 

 Dictyocysta, 45. 

 Didelphia, 364. 

 Didelphidse, 366. 

 Didelphys virginiana, 365, 366. 

 /ileitis ineptus, 352, 439. 

 Didymium difforme, 14. 

 I )ioiiyctilus, 303. 

 Difflugia pyriformis, 24. 

 Digestive system, of birds, 333, 334; of 



Mammalia, 358. 

 Digitigrade, 400. 

 Digits, of duck, 329; of frog, 300; of fowl, 



331- 



Dingo dog, 401. 



Dlnobryon , 38, 40. 



Dinocet as, 434. 



Dinoflagellata, 41. 



Dinornis robustvs, 337, 436, 437. 



Dinosauria, 426. 



Dinotheriitm giganteum, 434, 435. 



Diphycercal tail, 275. 



Diplopoda, 191. 



Dipnoi, 297, 420, 451, 453-456. 



Dippers, 355. 



Diprotodon, 438. 



Diptera, 215, 226, 227, 424. 



Discontinuity in distribution, 456. 



Discorbina, 26. 



Dispersion of species, 469. 



Dissepiment, 135. 



Distomum hepaticum, 109, no, in. 



Distribution, 7, 444, 514; by winds, 456; by 

 birds, 456; by currents, 456; by migra- 

 tion, 456; definition of, 513. 



Diurnal birds of prey, 343. 



Dobson, 211. 



Dodo, 352, 438, 439. 



Dogfish, 275, 277. 



Dogs, 401, 402; intelligence in, 488, 489; 

 skeleton of fore foot, 377. 



Dog tick, 185. 



Dohrn, 511. 



Doliolum, 265. 



Dolphins, 374, 433, 447, 451. 



Domestication, 461. 



Dominant characters, 475. 



Dormice, 390. 



Dorsal aorta, of dogfish, 277 ; of lamprey, 273. 



Doryphanta scutellaris, 223. 



Doryphora decemlineata, 221. 



Doves, 351. 



Down feathers, 327. 



Dragon, 496, 497. 



Dragon flies, 198, 199, 227. 



Drill snail, 235. 



Dromasognathae, 338, 452. 



Dromaius, 339. 



Dromedary, 382. 



Drones, 225, 226. 



Duckbill, 363. 



Duck hawk, 346. 



Duckmole, 363. 



Ducks, 342, 344. 



Dugongs, 372, 433. 



Duodenum, of frog, 301; of Mammalia, 



360; of pigeon, 333; of trout, 288. 

 Dytiscus, leg of, 194. 



Eagles, 345. 



Ear drum, of Amphibia, 302. 



Eared seals, 405. 



Earless seals, 405. 



Ears, of fishes, 274. 



Earthworm, 140. 



Earwig, 202, 204, 227. 



Ecdysis, definition of, 147. 



Echidna, 438, 454. 



Echidna kysttix, 363 ; E. oculcata, 364. 



Echinodermata, 85, 423, 447, 450. 



Echinoidea, 96. 



Echinorhynchus gigas, 124; E. lesiniformis, 



124. 

 Echinosphesrites aurantium, 89, 421. 

 Ecology, 7, 514; definition of, 514. 

 Ectoplasm, 21. 

 Ectoprocta, 129. 

 Ectosarc, 21. 



Edentata, 368, 432, 433, 439, 453, 454. 

 Eels, 289. 



Effective consciousness, 485, 486. 

 Efferent nerve, 482. 

 Egg capsules, of Selachii, 280. 

 Eggs of fishes, 287. 

 Egyptian cat, 404. 

 Egyptian scarab, 220. 

 Eimeria falciformis, 34. 

 Elasmobranchii, 276, 420. 

 Electric catfish, 290. 

 Electric eel, 290, 454. 

 Electric ray, 280. 

 Elephantiasis, 122. 

 Elephants, 377, 384, 434, 455 ; of Malta, 385, 



441. 

 Elephant shrew, 393. 

 Elephant-tooth shells, 241. 

 Elephas africttnus, 385 ; E. falconcri, 441 ; 



/: . indicus, 385 ; E. mclitensis, 441 ; E. 



primigenius, 440. 



