INDEX 



6*75 



587 ; of A ntedon rosacea, 545 ; of Asterias, 

 development of, in sulphocyauide of potas- 

 sium, 483 ; of Balanoglossiis clavigerus, 

 570 ; of Callidina russeola, 418 ; of 

 Cerebratulus lacteus, constitution of, 126 ; 

 of Clavelina, 632 ; of Ctenophora, constitu- 

 tion of, 98 ; of Cynthia partita, 610 ; of 

 Dentalium, maturation of, 325 ; of 

 Distaplia, 632 ; of Dolichoglossus koioal- 

 ei-skii, 582 ; of Echiuoidea, methods of 

 obtaining, 505, 506 ; of Hydromedusae, 

 constitution of, 98 ; of Ophiothrix fragilis, 

 485 ; of Planocera, 103 ; of Polygardius, 

 129 ; of Terebratulum septentrionalis, 408 



Egg-shell, outer, 3 (see Chorion) ; inner, 3 

 (see Vitelline membrane) 



Elaeoblast, formation of, in embryo of Salpa, 

 636 



Elasmobranchii, 456, 564, 569 



Elevator muscles of larva of Polygordius 

 appendiculatus, 148 



Embolobranchiata, 221 



Embryo, definition of, 19 ; formed from 

 larva, 26 ; of Amphiura squa/nata, 498 ; 

 of Vertebrata, compared with Coelenterata, 

 53 



Embryology, scope of, 1 



Embryonic area, in egg of Blatta, 261 ; in 

 egg of Diptera, 266 ; in egg of Donacia, 

 249 ; in egg of Doryphora, 261 ; in egg 

 of Hemiptera, 266 ; in egg of Lepisma, 

 264 ; in egg of Odouata, 266 ; in egg of 

 Scolopendra, 283, 284 



Embryonic phase of development, definition 

 of, 19 ; interpretation of, 26, 655, 656 



Endoderm, definition of, 53 ; formation of, of 

 Agelena, 224 ; of Astacus, 180 ; in C'ere- 

 bratulus lacteus, 119 ; in Clepsine, 161 ; 

 in Donacia, 248 ; of Euphausia, 192 ; 

 in Homarus, 191; in Lepisina, 264 ; in 

 Liniulus, 236 ; in larva of Membranipora, 

 388 ; in yephelis, 161 ; in Palaemon, 

 192 ; in Pcdlene, 243 ; in Peripatus 

 capensis, 170 ; in Phascolosoma, 375 ; in 

 Planocera, 109 ; in Polyphemus, 194 ; in 

 Scolopendra, 282 ; in Scorpion, 240 ; in 

 Tubularia, 55 



Endoderm lamella, erroneous theory of forma- 

 tion of, 64 ; formation of, inAurelia, 73 ; 

 in medusa of Podocoryne, 61 ; in medusa 

 of Tubularia, 58 



Endodermal plate of Astacus, 189 



Endodermic groove in embryo of Astacus, 

 181 



Eudodermic streaks in embryo of Donacia, 

 254 



Eudopodite of antenna in Astacus, 186 



Endostyle, formation of, in larva of Amphi- 

 oxus lanceolatns, 596 ; in Cyathozooid 

 embryo of Pyrosoma, 635 ; in Pacific 

 Tornaria, 581, 582 ; in tadpole of simple 

 Ascidians, 620 



Entelechy, 451, 483 ; definition of, 20 ; 

 theory of, 526 



VOL. I 



Enteropneusta, 568, 592, 605, 606, 608, 

 646, 662 ; development of, 569-586 



Eutoniscidae, 219 



Ephemeridae, 655 



Ephemeroptera, 245, 272, 287 



Ephydatia, development of gemmule of, 47-50 



Ephyra larva of Amelia, 72 ; of Pelagia, 74 



Epibole, definition of, 92 ; in embryo of 

 Beroe, 92 ; in embryo of Patella, 297 ; 

 in embryo of Peripatus capensis, 171 ; 

 in embryo of Planocera, 109 



Epicardial tubes, formation of, in Ciona 

 intestinalis, 626 



Epigastric coelom in larva of Asterias, 469 ; 

 in larva of Asterina gibbosa, 475, 480 



Epimorpha, 284 



Epineural canals, formation of, in Echinus 

 esculentus, 514 



Epineural flaps, formation of, in larva of 

 Ophiothrix fragilis, 495 



Epineural ridges, formation of, in larva of 

 Echinus esculentus, 514 



Epineural ring-canal, formation of, in Synapta 

 vivipara, 539 



Epiueural roof, formation of, in Ophiothrix 

 fragilis, 495 



Epineural sinus, formation of, in Donacia, 

 254, 255 



Epiueural space, formation of, in larva of 

 Echinus esculentus, 514 ; in larva of 

 Ophiura brevispina, 502 



Epineural veil, formation of, in larva of 

 Echinus esculentus, 514 



Epipodite in Limidus, 237 



Epistome of larva of Pedicellina, 400 



Equating division, definition of, 6 



Equatorial plate, definition of, 6 



Erichthoidiua stage in development of 

 Stomatopoda, 217 



Erichthus stage in development of Stomato- 

 poda, 218 



Eruciform type of Insect larva, 287 



Esperia, 47 ; development of, 44-46 



Eucarida, 177 



Euphausia, 192 



Euphausidacea, 177, 203, 208 



Evpomatus, 165, 313 ; development of, 154, 

 155 



Excretory canals, formation of, in Beroe, 95 



Excretory organs, formation of, in Amphiozus 

 lanceolatus 600 (see also Kidney and 

 Nephridium) ; in Ascaris megalocephala, 

 447 ; in Astacus, 188 ; in Callidina rus- 

 seola, 426 ; in Peripatus capensis, 124 



Exopodite of antenna in Astacus, 186 



Exopodites of limbs of prosoma in Limulus, 

 236 



Experimental embryology, aim of, 29, 

 30 ; of simple Ascidians, 630, 631 ; 

 of Asteroidea, 482-484; of Calcareous 

 sponges, 51 ; of Coelenterata, 96-98 ; of 

 Echinoidea, 522-529 ; of Mollusca, 305- 

 309, 329-332 ; of Nematoda, 448-454 ; 

 of Nemertinea, 124-126 



2X2 



