7 I2 



INDEX 



Drassidcz, 377. 



Drepanidotcenia, 166. 



Dromceidce, 596 ; Dromceus, 589, 596. 



Dromatherium, 685. 



Dromedary, 671. 



Drone,- honeybee, 312. 



Duckbill, 642, 646. 



Ducks, 590, 603, 630. 



Dugong, 645, 673. 



Duodenum, 481, 576, 583, 638. 



Duplicidentata, 643. 



Dynastes, 328, 362. 



Dytes, 589. 



Dytiscidtz, 360; Dytiscus, 332. 



Eagles, 590, 603, 605. 



Ear, frog, 505 ; perch, 440 ; rabbit, 640 ; 

 of vertebrates, 410-411. 



Eardrum, 640. 



Earthworm, 215-231 (see Lumbricus) . 



Earwig, 342. 



Ecdysis, 288. 



EcheneididcB, 444, 467. 



Echidna, 642, 646. 



Echinarachnius, 190, 205. 



Echinococcus, 168. 



Echinodermata, 189-214, 691, 693; clas- 

 sification, 189; development, 210; 

 parthenogenesis, 212; systematic po- 

 sition, 213. 



Echinoidea, 189, 202-205. 



Echinopluteus, 211. 



Echinorhynchus, 180. 



Echinosph&rites, 209. 



Echinus, 203, 204. 



Echiuroidea, 187; Echiurus, 187. 



Ecology, 26. 



Economic importance of, Amphibia, 526; 

 birds, 626-630; clams, etc., 251, 263; 

 coelenterates, 144; earthworm, 230; 

 echinoderms, 198, 208 ; fish, 442, 474- 

 476; flatworms, 168; insects, 370 

 371; lamprey, 420; mammals, 688 

 690; reptiles, 57-57i- 



Ectoderm, 88, 89. 



Ectoparasites, 161. 



Ectopistes, 609. 



Ectoplasm, 28. 



Ectoprocta, 184. 



Ectosarc, 28, 43, 53. 



Edentata, 643, 660-661. 



Edwardsiidea, 141. 



Eel, 444, 463, 514. 



Egestion, 30. 



Eggs of, Ascaris, 171; birds, 625; Vol- 



wx, 46, 47. 



Ejaculatory duct, 322. 

 Eland, 669. 

 Elanoides, 605. 

 Elaphe, 539; Elapina, 539, 564; Elaps, 



539, 562, 564. 



Elasmobranchii, 400, 422-431, 694, 695. 

 Elateridce, 361. 

 Electrotropism, 36, 58. 

 Elephantiasis, 174. 

 Elephants, 645, 672, 673. 

 Elephas, 645, 672. 

 Elk, 669. 



ElopidcB, 444, 458. 

 Elytra, 334. 

 Embattonurida, 651. 

 Embole, 272. 



Embryology, 26, 85-89 (see development). 

 Emeu, 589, 596. 

 Emyda, 536. 

 Emys, 535, 542. 

 Enamel, 635, 678. 

 Encystment, 42, 44, 49, 50. 

 Endolymph, 410. 

 Endopodite, 276, 277, 279. 

 Kndosarc, 28, 43, 53. 

 Endoskeleton, 391, 392, 403, 435, 436, 



437- 

 Engystoma, 512, 521 ; EfigystomatidtE, 512, 



521. 



Entameba, 70. 

 Enter occela, 25. 



Enter opneusta, 386-389, 691, 692. 

 Enter ozoa, 25. 



Entoderm, 88, 89, 109, no, in. 

 Entomostraca, 299-300. 

 Entoparasites, 161, 165. 

 Entoprocta, 184. 

 Eocene period, 686, 697. 

 Eohippus, 699, 700. 

 Eolis, 260. 

 Epanorthidcz, 648. 

 Epeira, 373, 375; Epeirida, 377. 

 Epemys, 660. 

 Ephemerida, 337, 338. 

 Ephyra, 131, 132. 

 Epibdclla, 161. 

 Epibole, 272. 

 Epicoracoid, 495, 496. 



