676 



INVEETEBEATA 



Experiments on the eggs of Ascaris, 448-454 ; 

 on the eggs of Berde, 96, 97 ; on the eggs 

 of Bolina, 98 ; on the eggs of Gerebratulus, 

 124-126 ; on the eggs of dona, 631 ; on 

 the eggs of Clytia, 96, 97 ; on the eggs of 

 Cynthia partita, 630 ; on the eggs of 

 Dentaliuin, 329 - 332 ; on the fertilized 

 eggs of Echinoidea, 524, 525 ; on the eggs 

 of Geryonia, 96 ; on the eggs of Laodice, 

 96 ; on the eggs of Liriope, 96 ; on the 

 eggs of Mitrocoma, 96 ; on the eggs of 

 Molgula, 631 ; on the eggs of Patella, 

 305-309 ; on the eggs of Phallmia, 631 



External opening of kidney of Dreissensia, 

 formation of, 345 



External perihaemal ring-canal of Asterina 

 gibbosa, formation of, 475 



External yolk-sac of Loligo, formation of, 

 360 



Eye, formation of, in larva of simple Ascidiau, 

 620 ; in Balanoglossus clavigerus, 574 ; in 

 Loligo, 357 ; in Paludina, 315 ; in Patella, 

 302 ; inPeripatus capensis, 176 ; in larva of 

 Phascolosoma, 376 ; in larva of Polygordius 

 appendiculafus, 148 ; mSagitta bipunctata, 

 433 ; in New England Tornaria, 575 



Eyelids, formation of, in Loligo, 363 



Eye-spot, formation of, in larva of Dytiscus, 

 1273 



Eye -stalk, formation of, in Astacus, 184, 

 189 ; in Loligo, 357 



Fascia of muscles, formation of, mAmp/uo,i-us 

 lanceolatus, 599 



Fat body, formation of, in embryo of 

 Donacia, 256 ; in embryo of Scolqpendra, 

 283 



Fat cells in embryo of Agelena, 227 



Female, definition of, 2 



Female proimcleus, 9 



Fertilization of egg of Cynthia partita, 611 



Filament plate, formation of, in I'ftyUodromia, 

 263 



Fin-ray cavities, formation of, in larva of 

 Amphioxus lanceolatus, 599 



Fin-rays, formation of, in Aipln<>.i-nx lunceo- 

 latus, 599 



Fiona, 320, 321, 323, 324 



First maxilla of Astacus, 186 



First maxillary segment in Donacia, 252 



First polar body, definition of, 9 



First somatoblast, formation of, in Dreis- 

 sensia, 333 ; in Nereis, 155 ; in Nephelis, 

 160 



Fissurella, 300, 304, 320 ; metamorphosis 

 of larva of, 305 



Fixation, definition of, 39 ; of larva of Ante- 

 don rosacea, 548 ; of Brachiolaria larva of 

 Asterias, 409 ; of larva of Antenna gibbosa, 

 473 ; of larva of Clatlu-liin, 47 ; of larva 

 of Bsperia, 45 ; of larva of ('r/i/it/n, 39- 

 41 ; of larva of Leucosolena, 47 ; of C'ypho- 

 nautes larva of Mei/ihru ni/>om, 394 ; of 

 larva of OscareUu, 41 ; of larva of Phy- 



lactolaemata, 396 ; of larva of Sponyilla, 



47 

 Fixation pit of larva of Antedon ros<-t-<>. 



formation of, 547 

 Fixed cheek in Trilobite larva of Litnulvs, 



238 

 Fixing disc of larva of Antedon rosacea, 551 ; 



of larva of Asterias, 469 ; of larva of 



Asterina gibbosa, 473 

 Flabellum of Limulus, 237 

 Flemming's fluid, composition and use of, 33 

 Flies, larvae of, 25 



Float, development of, in Siphonophora, 66 

 Floscularidea, 418 

 Flustrella, larva of, 395 

 Follicle cell, definition of, 3 

 Food -yolk, 19; definition of, 3. (See 



Deuteroplasm.) 

 Foot, formation of, in Dentalium, 329 ; 



in Dreissensia, 342 ; in Paludina, 314, 



323 ; in Patella, 299 ; in Trochus, 323 

 Foot-gland, formation of, in Callidina rtis- 



seola, 425 

 Foot-plate, formation of, in larva of Antedon 



rosacea, 551 

 Foot segment in larva of Tercbratulina sep- 



tentrionalis, 411 



Fore-foot, formation of, in Loligo, 358 

 Formalin, use of, 33 

 Formation of layers, definition of, 27 ; in 



Crustacea, 191-196 ; interpretation of, 659 

 Formative stimuli in eggs of Echinoidea, 528, 



529 

 Free cheek in Trilobite larva of Linmhix. 



238 



Frontal field in larva of Asterias, 464 

 Frontal filament in Nauplius larva of Cirri- 



pedia, 202 



Functional continuity, law of, 66 

 Funnel of uephridium of Criodi'ilux lacinim, 



formation of, 159 ; in Ctenophora, 561 ; 



completion of, in Loligo, 362 ; formation 



of, in Loligo, 357 



Galerucella, 271, 272, 277, 280 



Galerucetta ulmi, metamorphosis of, 267-270 



Gamete, definition of, 2 



Gametogenesis, definition of, 2 



Ganglion, formation of, of adult Cionn ///- 

 testinalis, 622 ; of Donacia, 252 



Gastral filaments, formation of, in Auirlia. 

 71 



Gastral groove in embryo of Donacia, 250 ; 

 closure of, in embryo of Donacia, 253 



Gastropoda, 291, 504, 651 ; ancestors of, 

 368, 369 ; development of, 290-324 



Gastro-vascnlar canals of Ctenophora, 561 



Gastrula, definition of, 68 ; interpretation of, 

 661 ; of Anti'Jon rosacea, 545 ; of Ascaris 

 megalocephala, 443, 444; of Astacus, 180; 

 of Asterias, 460 ; of Asterias, experiments 

 on, 483; of Aurelia, 68; of Balanoglossus 

 darii/i'i'iift, 571 ; of Cerelirnf ul 11* lacteus, 

 120; of Ech inusesculcntus, 507; of Mt'r- 



