672 



INVERTEBRATA 



Chaetae of larva of Terebratulina septentrion- 



alis, 411, 413 

 Chaetoguatha, 454, 455 ; development of, 



428-436 



Chaetopoda, 128 

 Chambered organ, formation of, in Antedon 



rosacea, 549 



Cheilostomata, 386, 394 

 Cheliceral ganglia, fate of, in Agelena, 232 

 C'heraphilus, Mysis larva of, 215 

 Chilaria of Limulus, formation of, 237 

 Chilopoda, 280, 281, 284, 285 

 Chin in larva of simple Ascidian, 622 

 Chitiu, nature of, possibly allied to uric acid, 



176 



Ckiton, 320, 322 

 Chiton polii, 320 

 Chlorostoma, 523 

 Chondrostei, 569 

 Chorda-neural cells in embryo of Cynthia 



partita, origin of, 614 

 Chordata, 568. (See Vertebrata.) 

 Choriou 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 Polyyordius 



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, 325 

 Ciliated lobes, formation of, in larva of 



Yungia, 112, 113 

 Ciliated pits, formation of, in Polygordius 



appendiculatus, 148 

 Ciliated tentacles, formation of, in Phascolo- 



soma, 379 

 Cingulum, formation of, in Callidina russeola, 



425 



dona, 631, 645 

 dona 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 Mollusca, 291 ; 



of Nemertinea, 118 ; of Platyhelminthes, 

 102 ; of Podaxonia, 372 ; of Polyzoa, 386 ; 



of Porifera, 37 ; of Protochordata, 568 ; of 

 Rotifera, 418 



Glathrina, 46 



Clava, umbrella cavity of, 63 ; development 

 of genital cells of, 62 



Clavelina, 619, 632, 638, 644, 646 



Cleavage, see Segmentation of egg 



Clepsine, 161 



Cloaca of A scaris megalocephala, 438 ; forma- 

 tion of, in embryo of Pyrosoma, 634 



Closed dwarf larvae of Patella, 307 



Club-shaped gland, formation of, in larva of 

 Amphioxus lanceolatus, 596 



Glytia, medusa of, 59 ; experiments on the 

 eggs of, 96, 97 



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

 development of, 53-101 



Coelenteron, formation of, in Tubidaria, 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 

 Bugida, 398 ; in embryo of Callidina 

 russeola, 427 ; in embryo of Cribrella, 

 481 ; in embryo of Cucumaria planci, 

 542 ; in larva of Dolichoglossus kowa- 

 levskii, 582 ; in larva of Dolichoglossus 

 pusillus, 583 ; in embryo of Donacia, 253 ; 

 in embryo of Dreissensia, 337 ; in larva 

 of Holothuria tubulosa, 541 ; in embryo of 

 Loligo, 361, 362 ; in embryo of Alacro- 

 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 

 Phascolosoma, 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 Terebratulina 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 



