672 



INVEETEBEATA 



Chaetae of larva of TerebrcUulina septentrion- 

 alts, 411, 413 



Chaetogiiatha, 454, 455 ; development of, 

 428-436 



Chaetopoda, 128 



Chambered organ, formation of, in Aiitedon 

 rosacea, 549 



Cheilostomata, 386, 394 



Cheliceral ganglia, fate of, in Agelena, 232 



Cheraphilus, IVlysis larva of, 215 



Chilaria of Limulus, formation of, 237 



CMlopoda, 280, 281, 284, 285 



Chin in larva of simple Ascidian, 622 



Chitin, nature of, possibly allied to uric acid, 

 176 



Chiton, 320, 322 



Ohiton polii, 320 



Chlorostoma, 523 



Chondrostei, 569 



Chorda-neural cells in embryo of Oynthia 

 partita, origin of, 614 



Chordata, 568. [See Vertebrata.) 



Chorion of egg of Gynthia partita, 610 ; 

 definition of, 3 



Chromatin, emitted into cytoplasm of egg, 3 



Chromosome, accessory, 14 



Chromosomes, definition of, 2 ; division and 

 fusion of, 4 ; bivalent, 12 



Chrysomelidae, 267, 277, 278, 279 



Ciliary body of Cephalopod eye, formation of, 

 367 



Ciliated filter in gut of larva of Polygordius 

 appendiculatus, 149 



Ciliated groove in Annelid larvae, 174 ; in 

 larva of Gapitella, 156, 167 ; in larva of 

 Echiurus, 167 ; in larvae of Echiuroidea, 

 163 ; in larva of Patella, 309 ; in larvae 

 of Solenogastres, 326 



Ciliated lobes, formation of, in larva of 

 Yungia, 112, 113 



Ciliated pits, formation of, in Polygordius 

 appendiculatus, 148 



Ciliated tentacles, formation of, in Phascolo- 

 sorna, 379 



Cingnlum, formation of, in Oallidina russeola, 

 425 



Ciona, 631, 645 



Giona intestinalis, 609, 619 



Circular muscles, formation of, in Nephelis, 

 162 ; in Criodrilus lacuum, 158 



Cirripedia, 177, 185, 622, 655, 656 ; ances- 

 tral origin of, 213 ; development of 

 (formation of layers), 195 ; larval history 

 of, 201, 202 ; pupa of, 28, 202 



Cistella neapolitana, 407 



Cladocera, 177, 662; ancestral, origin of, 

 212 ; larval history of, 200 



Classification of Annelida, 128 ; of Arach- 

 nida, 221 ; of Arthropoda, 169 ; of 

 Brachiopoda, 407 ; of Coeleuterata, 53 

 of Crustacea, 177 ; of Echinodermata, 

 456 ; of Insecta, 245 ; of MoUusca, 291 

 of Nemertinea, 118 ; of Platyhelminthes, 

 102 ; of Podaxonia, 372 ; of Polyzoa, 386 



ofPorifera, 37 ; of Protochordata, 568 ; of 

 Rotifera, 418 



Olathrina, 46 



Otava, umbrella cavity of, 63 ; development 

 of genital cells of, 62 



Glamlina, 619, 632, 638, 644, 646 



Cleavage, see Segmentation of egg 



Clepsine, 161 



Cloaca of Ascaris megalocephala, 438 ; forma- 

 tion of, in embryo of Pyrosoma, 634 



Closed dwarf larvae of Patella, 307 



Club-shaped gland, formation of, in larva of 

 Aniphioxus lariceolatus, 696 



Olytia, medusa of, 59 ; experiments on the 

 eggs of, 96, 97 



Coelenterata, 116, 161, 166, 467, 561, 661 ; 

 development of, 53-101 



Coeleuteron, formation of, in Tvbularia, 55 ; 

 in C/rticina crassicomis, 79 



Coelom, ancestral origin of, 165 



Division of, in embryo of Dreissensia^ 

 343 ; in larva of Synapta digitata, 533 



Formation of, in Actinotrocha larva, 

 382 ; uiQwihTYooiAmphioxuslanceolatus, 

 592 ; in embryo of Angelena, 225, 226 ; 

 in embryo of Argiope, 416 ; in embryo 

 of Astacws, 187, 189 ; in larva of Asterias, 

 461 ; in larva of Asterina gibbosa, 472 ; 

 in embryo of Blatta, 261 ; in bud of 

 Bugula, 398 ; in embryo of Oallidina 

 russeola, 427 ; in _ embryo of Cribrella, 

 481 ; in embryo of Cucumaria planci, 

 642 ; in larva of Dolichoglossus kowa- 

 levskii, 582 ; in larva of Dolichoglossus 

 pusillus, 583 ; in embryo of Donacia, 253 ; 

 in embryo of Dreisserisia, 337 ; in larva 

 of Holothii/ria tubulosa, 641 ; in embryo of 

 Loligo, 361, 362 ; in embryo of Macro- 

 biotus, 243 ; in embryo of Nephelis, 163 ; 

 in larva of Ophiothrix fragilis, 487 ; in 

 embryo of Ophiura brevispina, 501 ; in 

 embryo of Paludina, 311 ; in embryo 

 of Peripatus capensis, 171 ; in larva of 

 Plmscolosoma, 377 ; in larva of Polygor- 

 dius, 138 ; in embryo of Sagitta bipunc- 

 tata, 430 ; in embryo of Scolopendra, 

 283 ; in larva of Synapta digitata, 531 ; 

 in embryo of Terehratulina septentrionalis, 

 409; modification of, 411; in larva- of 

 Unio, 352 



Coelom-forming substance in the eggs of 

 Asterias, 483 



Coelomic ganglia, formation of, in Ophiothrix 

 fragilis, 498 



Coelomic grooves, formation of, in embryo of 

 Amphioxus lanceolatus, 592 



Coelomic sacs, formation of, in larva of 

 Asterias, 461 ; in larva of Ophiothrix 

 fragilis, 487 ; segmentation of, in Sagitta 

 bipunctata, 431 



Coelomiduct, nature of larval kidney of 

 Gastropoda, 323 



Coelomiducts of Brachiopoda, 407 



Coleoptera, 245, 261, 262, 266, 277 



