INVERTEBKATA 



Chaetae of larva of Terebratulina septentrion- 

 al is, 411, 413 



Chaetognatha, 454, 455 ; development of, 

 428-436 



Chaetopocla, 128 



Chambered organ, formatiou of, in Antedon 

 rosacea, 549 



Clieilostomata, 386, 394 



Cheliceral ganglia, fate of, in Agelena, 232 



Cheraphilus, Mysis larva of, 215 



Chilaria of Liinulus, formation of, 237 



Chilopoda, 280, 281, 284. 285 



Chin in larva of simple Ascidian, 622 



Chitin, nature of, possibly allied to uric acid, 

 176 



Chiton, 320, 322 



Chiton pulii, 320 



Chlomxtunni, 523 



Chondrostei, 569 



Chorda-neural cells in embryo of Cynthia 

 partita, origin of, 614 



Chordata, 568. (See Vertebrata.) 



Chorion of egg of Cynthia 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 Capitella, 156, 167 ; in larva of 

 Echiurus, 167 ; in larvae of Echiuroidea, 

 163 ; in larva of Patella, 309 ; in larvae 

 of Solenogastres, 325 



Ciliated lobes, formation of, in larva of 

 YungM, 112, 113 



Ciliated pits, formation of, in Polygordius 

 appendiculatus, 148 



Ciliated tentacles, formation of, in Phascolo- 

 soum, 379 



Ciugulum, formation of, in Callidina russeola, 

 425 



dona, 631, 645 



dona intestiiialis, 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 

 (formatiou 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 Mollusca, 291 

 of Nemertinea, 118 ; of Platyhelmiuthes 

 102 ; of Podaxonia, 372 ; of Polyzoa, 386 



of Porifera, 37 ; of Protochordata, 568 ; of 

 Rotifera, 418 



Clathrina, 46 



Clava, umbrella cavity of, 63 ; development 

 of genital cells of, 62 



Clavelina, 619, 632, 638, 644, 646 



Cleavage, see Segmentation of egg 



L'lepsine, 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 

 Aiirphio.cus lanceolatus, 596 



Clytia, medusa of, 59 : experiments on the 

 eggs of, 96, 97 



Coelenterata, 116, 161, 166, 457, 561, 661; 

 development of, 53-101 



Coelenterou, formation of, in Tubt/laria, 55; 

 in Urticina crassicornis, 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 ; in embryo of Amphioxus lanceolatus, 

 592 ; in embryo of Angelena, 225, 226 ; 

 in embryo of Argiope, 416 ; in embryo 

 of Astacus, 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 Callidina 

 russeola, 427 ; in embryo of Cribrella, 

 481 ; in embryo of Cucumaria planci, 

 542 ; in larva of Dolichoglossus komi- 

 levskii, 582 ; in larva of Dolichoglossus 

 pusillus, 583 ; in embryo of Donacia, 253 ; 

 in embryo of Dreissensia, 337 ; in larva 

 of Holothwria tubidosa, 541 ; in embryo of 

 Loligo, 361, 362 ; in embryo of JUacro- 

 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 

 Pliascolosoma, 377 ; in larva of Polygor- 

 dius, 138 ; in embryo of Sag Ma bipunc- 

 tata, 430 ; in embryo of Scolopendra, 

 283 ; in larva of Synapta digitata, 531 ; 

 in embryo of Terebratulina septentrionalis, 

 409; modification of, 411; in larva of 

 Unio, 352 



Coelom-formiug substance in the eggs of 

 Asterias, 483 



Coelomic ganglia, formation of, in Op/t //////> 

 fragilis, 498 



Coelomic grooves, formation of, in embryo of 

 A mphioxus 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 



