550 



INDEX 



Diplopoda, 240. 



Dipnoi, 365, 405. 



Diptera, 243, 245. 



Dipus, 541. 



Disc, trochal, 178. 



Discorbina, 25. 



Disease, cattle, 58; silkworm, 58. 



Distomum hepaticum, 129, 135. 



Distribution, bathymetrical, n; geo- 

 graphical, ii ; geological, n ; zoo- 

 geographical, ii. 



Division, self, 18, 44. 



Dog, 526. 



Dogfish, 366. 



Dolphin, 526, 536. 



Dorippe facchino, 124. 



Doris tuberculata, 290, 291. 



Down feathers, 461. 



Draco, 441, 452. 



Dracunculus medinensis, 156. 



Dromaeus, 483. 



Duck-bill, 525. 



Duct, 65; ejaculatory, of leech, 210; 

 pneumatic, 403. 



Dugong, 526. 



Duodenum, 346; of birds, 476; of 

 mammals, 507. 



Ear, of bird, 459 ; of Crustacea, 228 ; 

 of frog, 426; of mammals, 518 ; of 

 vertebrates, 383. 



Earthworm, 201, 202. 



Ecdysis, 440. 



Echidna, 525, 527. 



Echinarachnius parma, 173. 



Echinodermata, 157. 



Echinoidea, 170. 



Ectoderm, 79. 



Ectoprocta, 183. 



Ectosarc, 28. 



Eczema, caused by a parasitic vorti- 

 cella, 55. 



Edentata, 526. 



Egg, 59, 60 ; segmentation of, 60. 



Egg-shell, 360; of bird, 483; of mol- 

 luscs, 265; of sharks, 384. 



Eggs, of crocodiles, 456 ; demersal, 



405 ; of frog, 428 ; pelagic, 405 ; of 

 reptiles, 451 ; of sharks, 385 ; of 

 turtles, 455; summer and winter, 

 180 ; of reptiles, 452. 



Elasmobranchii, 365. 



Electric catfish, 400. 



Electric eel, 400. 



Elephant, 526. 



Elytra, 245. 



Embryo, ciliated, of flat-worms, 133 ; 

 cysticercoid, 143 ; hexacanth, 141. 



Embryology, 4. 



Embryo of shark, 386. 



Emu, 403. 



Enamel, 343. 



Encystation, 30. 



Endoderm, 79. 



Endolymph, 357. 



Endopodite, 216. 



Endoprocta, 181. 



Endosarc, 28. 



Endoskeleton, 67. 



Endostyle, 317, 319. 



Enteron, 92. 



Entomostraca, 232. 



Entovalva, 281. 



Eolis, 291. 



Epeira diadema, 259. 



Ephelota, 51. 



Ephyrula, 112. 



Epicoracoid bone, 414. 



Epidermis, 63. 



Epiglottis, 506. 



Epimerite, 58. 



Epipharynx of insects, 250. 



Epiphragm, 288. 



Epiphysis cerebri, 354, 380. 



Epipodia, 291. 



Epipodite, 218. 



Episternum, of frog, 415 ; of reptiles, 



445- 



Epistoma of Crustacea, 216. 

 Epistylis, 48, 49. 

 Epithelium, 63, 64; deric, 63. 

 Equidae, 538. 

 Ethmoid, 498. 

 Ethmo-turbinals, 498. 



