INDEX 



677 



Mollis, 243 ; of Membmnipora, 388 ; of 

 Newt, experiments on, 660 ; of Palu- 

 dina, 310 ; of Pedicdlina echinata, 399 ; 

 of Peripatus capensis, 171 ; of Poly- 

 gordius, 132, 139 ; of Sagitta bipunciata, 



429 ; of Synapta digitata, 631 ; of Tere- 

 bratvZina septentrionalis, 409 ; of Urticina 

 crctssicomis, 77 



Gastrulation in embryo ot Amphioxiis lanceo- 

 latus, 589 ; in embryo otAscaris megaloce- 

 phala, 444 ; in embryo of Aurelia, 68 ; 

 in embryo of Callidina russeola, 422 ; in 

 embryo of Cynthia partita, 616, 617; de- 

 fined, 68 ; in embryo of Dentalium, 328 ; 

 in embryo of Dreissensia, 335 ; in embryo 

 of Patella, 295, 297 ; in Peripatus capensis, 

 171 ; in embryo of Phascolosoma, 375 ; 

 in embryo of Urticina crassicornis, 78 



Gemraule of Spongilla and Ephydatia, 47 



Generative cell, formation of, in Polyphemus, 

 194 



Genital bursa of AmphUira sqiiamala, as 

 womb, 484 



Genital cells, development of, in Ascaris 

 niegalocephala, 443 ; in Donacia, 257 ; in 

 Loligo, 358 ; in Sagitta bipunciata, 429, 



430 ; in Tuhularia, 58 



Genital coelom, formation of, in Loligo, 364 



Genital diiot, formation of, in Agelena, 230 ; 

 in Astacus, 189 ; in Asterina gibbosa, 481 ; 

 in Paludina, 316 ; in Peripatus capensis, 

 175 ; in Scolopendra, 283 ; of Scorpion, 

 241 



Genital folds, formation of, in Loligo, 364 



Genital operculum, formation of, in Limulus, 

 238 ; in Scorpion, 241 



Genital organs, development of, in Agelena, 

 230; inAmphioxtislanceolatus, 600-601; in 

 Antedon rosacea, 558 ; m Astaxus, 189; in 

 Asterinagibbosa, 480 ; in Callidinarusseola, 

 424 ; in Ciicumaria glacialis, 540 ; in Dreis- 

 se«sia, 337, 346; iaEchinusesculentus,h21; 

 iniiffltftes, 236; ia Loligo, S^i; in Macro- 

 biotus, 248 ; in Molgula, 628, 629 ; in 

 Paludina, 316; m Peripatus capensis,11 b; 

 in Phyllodromia, 262 - 263 ; in Sagitta 

 bipunciata, 433, 434 ; in Scolopendra, 

 283 ; in Scorpion, 240 ; in Synapta vivi- 

 para, 539, 540 ; iu Tornaria of Nassau, 

 581 ; in blastozooid of Urochorda, 639 



Genital plates, formation of, in Echinus 

 esculentus, 516 



Genital rachis, formation of, in Amphiura 

 aquamata, 501 ; in Asterina gibbosa, 481 ; 

 iu Echinus esculentv,s, 520 



Genital ridge, formation of, in Donacia, 256 ; 

 in Phyllodromia, 263 



Genital stolon (see also Dorsal organ), forma- 

 tion of, in Amphiura squamata, 500 ; in 

 Asterina gibbosa, 480 ; in Echimis escic- 

 lentus, 516 



Gephyrea, 163, 401, 416 



Gephyrea nuda, 372 



Gephyrea tubicola, 372, 380 



Germ-layers, definition of, 27 



Germarium of Oallidina russeola, 424 



Germinal disc, see Embryonic area 



Germinal spot, definition of, 3 



Germinal vesicle, definition of, 3 



Oeryonia, experiments of eggs of, 96 



Geryonidea, development of, 67 



Gill, development of, in Astacus, 189 ; in 

 Dreissensia, 343 ; in Loligo, 357 ; in 

 Paludina, 315 ; in Salpa, 636 ; early 

 formation of, in Cephalopoda, 369 ; late 

 formation of, in Gastropoda and Pelecy- 

 poda, 369 



Gill-books, formation of, in Limulus, 238 



Gill-pouches, formation of, in New England 

 ■Tornaria, 577 



Gill-slit, first, formation of, in larva of Am- 

 phioxus, 596 



Gill-slits, formation of, in larva of simple 

 Ascidian, 620 ; in embryo of Pyrosoma, 

 634 



Glabellum in Trilobite larva of Limulus, 238 



Glacial acetic acid, use of, 33 



Glandular cells of larva of Oalerucella ulmi, 

 metamorphosis of, 268 



Glandular pockets of mid-gut in Donacia, 

 255 



Glandular tube of larva of Achtheres amblo- 

 plitis, 207 



Glass body of ocelli of Dytiscus, 274 



Glass-crab, 214 



Clochidiura, 655 ; larva of Unionidae, 350 



Glockenkern of Medusa of Tubularia, 58 



Glossiphonia, 161 



Gnathites, formation of, in ancestors of 



* Arthropoda, 244 



Gnathobdellidae, 128, 160, 163, 184 



Gonangium, deiinition of, 63 - 



Gonidial groove of Actinozoa, definition of, 

 83 



Gonocoele, definition of, 166 ; formation of, 

 in Amphioxus lanceolatus, 587, 601 



Gonophores of Glaxa, 62 ; of Cordylophora, 

 62 ; of Halecium, 62 ; of Sertularia, 62 ; 

 of Tubularia, 54 



Gorgoria, 86 



Grantia, 43, 44, 46, 47, 51, 52; develop- 

 ment of, 37-43 



Grantia compressa, 37 



Grub of Donacia, 260 ; of Doryphora, 261 



Gut, development of, in Amphioxu^s lanceo- 

 latus, 595 ; in Antedon rosacea, 547 ; in 

 larva of Asterias, 461 ; in CerebratuMs 

 lacteus, 120 ;' in Cribrella oculata, 481 ; 

 in Sagitta bipunciata, 431 ; in Solaster 

 endeca, 482 ; in Terebratulina septentrion- 

 alis, 409 



Gymnoblastea, 53 



Gymuolaemata, 386 



Haeraatoxylin (Grenacher's), advantages of, 



35 

 Haemocoele of Peripatus capensis, formation 



of, 172 



