INDEX 



819 



ECHINUS, 393 : General external features, 

 393, 394, 395 : Corona, 396 : Aristotle's 

 lantern, 397-: Nervous system, 398: 

 Ambulacra! system, 399 : Enteric canal, 

 399, 400 : Coelome, 399 : Blood-vascular 

 system, 400 : Reproductive organs, 

 400 : Development, 400 : Systematic 

 position, 414 



Echiuroidea, 496*, 497, 498, 499, 502 

 Echinrn*, 496, 497, 500, 501 

 I Ectobranchiata, 415* 

 ! Ectocyst, 341* 

 | Ectoderm, 23* See Body-wall 



Ectoprocta, 347*, 348 : Structure of body- 

 wall, 351 : Alimentary canal, 351 : 

 Nervous system, 351 : Nephridia, 352 : 

 Avicularia, 352 : Vibracula, 352 : Re- 

 production and development, 352 : 

 Ethology and distribution, 353 



Ectosarc, 46 



Edriasteroidea, 414*, 435 



Edwardsia, 200, 202, 227, 229 



Eggs See Development 



Eimerict, 84 



Ejaculatory duct, 243 



Elasipoda, 412*, 428, 434 



Eledone moschata, 798 



Elephant's tusk shells, 756 



Eleutherozoa, 410* 



Elk-horn coral, 156, 157 



Elytra, of Cockroach, 622 : Polychteta, 

 469 : Coleoptera, 635, 640 



Embryology, 3* See Development 



Empis, 644 



Emulsions, 34 



Encystation, 45*, 46, 59 



Endites, 530 



Endocyst, 341* 



Endoderm, 23* 



Endoderm-disc, of Afttacu* T 558 



Endoderm lamella, 136* t- 



Endogastric, 777* 



Endophragmal system, of Adacu*, 542 



Endopodite, 538* 



Endoprocta, 340, 348*, 354: Vestibule, 

 354 : Nephridia, 354 : Cloaca, 354 : 

 Ganglion, 354 : Testes and ovaries, 

 354 : Foot-gland , 354 : Development, 

 355 



Endosarc, 46 



Endoskeieton, 31* 



Endosternite, 655, 667 



End-sac, 534 



Enteric canal See Digestive system 



Enteroccele, 389 



Enterozoa, 105 



Entobranchiata, 415* 



Entovalva, 711 



Environment, 9* 



Eocene, 7 



Eolis, 734, 742, 744 



Epeira diadema, 664 



Ephelota, 100, 10} 



Ephemera, 633 



Ephemeridw, 641, 653 



Ephippium, 597 



Ephyropsis, 179, 180 



Ephyrula, of Aurdia, 175* 



Epiblast, 23* 



Epibolic gastrulation, 275 



Epiboly, 218* 



Epicranium, 620*, 637 



Epidermis, 24, 31 See Body -wall 



Epimerite of Gregarinida, 82, 83* 



Epineural canals, 398* 



Epipharynx, 641 



Epiphragm, 738 



Epiphysis, of Sea-urchin, 398 



Epipodite, 544* 



Epipodium, 740 



Epistoma, of Asfacm, 542 



Epistome, 340, 351, 356 



Epistylis plicatilis, 92, 94 



Epistylis umbellaria, 93 



Epitheca, 205* 



Epithelia, 24* : Non- stratified, 24* : 

 Stratified, 24* 



Epithelium, enteric, 33* 



Equatorial plate, 18* 



Equi valve, 699* 



Erga-silus, 564, 575, 576 



Estheria, 564, 571 



Ethiopian, 9* 



Ethology, 9* : of Platyhelminthes, 283 : 

 Rotifera, 335 : Ectoprocta, 353 : Echi- 

 nodermata, 434 : Chaetopoda, 488 : 

 Hirudinea, 522 : Crustacea, 600 : In- 

 secta, 651 : Arachnida, 672 : Pelecy- 

 poda, 710 : Amphineura, 720 : Gastro- 

 poda, 755 



Eiu'hlams, 328 



Euchlora, 222 



Eucirripedia. 565*, 577, 579 



Eucope, development, 152 

 Eucopepoda, 564*, 573, 574, 575, 602 

 Endendrium, 140 

 EUGLENA VIRIDIS, 67, 68 : Systematic 



position, 70 

 Eulamellibranchiata, 696*, 697, 698, 711, 



712 



Eucarida, 568*, 587 

 Eucopella, 134 

 Eugleni-dw, 70 

 Ettglenoidea, 70 

 Eumalacostraca, 566*, 581 

 Euphausia, 568, 595, 599 

 Euphausiacea, 568*, 587, 594, 596, 599, 



603 



Euphrosyne, 468 

 Euphyllopoda, 596 

 Euplectella, 120 

 Eiipomatus, 485 

 Euryalida, 417, 420, 421 

 Eurypterida, 662*, 666, 668, 673, 678 

 Eurypterus fischeri, 668 

 EUSCORPIO See BUTHUS 



