INDEX 



679 



Iiifundibnluin of Ctenophora, 561 

 Iiihalent pores of Grant ia, formation of, 43 

 Ink-gland, formation of, in Luliyu, 358 

 Inner segment of lens, formation of, in 



Cephalopod eye, 366 



Insecta, 169, 177, 204, 281, 282, 284, 285, 

 652, 662 ; embryonic development of, 

 245-266 ; metamorphosis of, 266-280 

 Insecta Hexapoda, 245 

 Instar, definition of, 19 

 Intercalary segment in embryo of Donacia, 

 252 ; in embryo of L<'ji!sina, 265 ; in 

 embryo of Scolopenctra, 282 

 Intermediate cells of Molluscan cross in 



embryo of Patella, 294 

 Intermediate dorsal arms of ciliated band in 



larva of Si/napta iU<jitat, 533 

 Intermediate girdle-cells, degeneration of, in 

 larva of Polyyonliu.s appendiculatus, 149 ; 

 formation of, in embryo of Phascolosoma, 

 374 



Internal madreporite, formation of, in An- 

 tarctic Cuci/niaria, 542 ; in Synapta 

 diijitata, 539 

 Internal perihaemal ring-canal, formation of, 



in Asterina gibbosa, 475 

 Internal sac in Cyphouautes larva, 390, 392 

 Internal yolk-sac, formation of, in (<//,</", 



360 

 Inter-radial cells of embryo of Poli/gordii'.-', 



135 



Inter-radial lobe of stomach of Aureliu, 71 

 Inter-radius in egg of Polygordius, 135 

 Intestine, formation of, in Anti '</</// rosacea, 

 552; in larva of .!*/-//*, 462; in larva 

 of Asterina gibbosa, 472 : in larva of 

 Balanoglossus clavigerus, 573 ; in ])en- 

 talium, 328 ; in Dreisxensiu, 337 ; in 

 larva of Echini's esculent us, 508 ; in adult 

 Echinus esci'.lent'its, 520 ; in Loligo, 364 ; 

 in larva, of Membranipora, 390; in larva 

 of Ophiotforix fragilis, 487; in larva of 

 Peilicclliini t'l'/ii/tii/K, 400 ; in larva of 

 Synapta digitata, 532 



Introvert of Phascoh>si.nnu, formation of, 379 

 Imagination in eggs of Astacus, 181 

 Invertebrata, 662 ; embryology of, 30 

 Iris, formation of, in eye "t /.//:/<', 363, 367 

 Islands of embryonic tissue in mid-gut of 



larvae of Mnscidae, 279 

 Isoplenra, 291 

 Isopoda, 22, 177, 193, 219 



Jaws of Echinus I'scti/en/nx, formation of, 520 

 Jaw-region of embryo of Donacif, 251 

 Jaw-segments in embryo of Scu/njn ml rii, 282 

 .1 ii I us, development of, 284 



Karyokiuesis of zygote, 9, 10 



Kidneys (see also Excretory organ and 

 Nephridinm), formation of, in Dreissensia, 

 343 ; in Loligo, 362 ; in Paludina, 314 ; 

 in Perijintus capensis, 174 ; in Unin, 353 



Krohniv, 428 



Labial palps, formation of, in Dn :i*.^ : u*in. 



344 

 Labrum, formation of, in Asfftciix, IS.'!; in 



l>oiiiii'iij, 252 



Laeotropic cleavage, definition of, 105 

 Laniellibranchiata, 291 

 Laoilice, experiments on the eggs of, 96 



Larva, definition of, 19 



Larva of Amphio.n'a lanceolatus, 593-600 ; 

 of Anti-linn I'usni-i'K. 517-553: of simple 

 Ascidian organization of, 619-622 ; of 

 Asti-rinn i/i/iln'Sii, 472-477 ; of Coleoptera, 

 287 ; of Vribrella ocnfitln, 481 ; of Cucu- 

 maria /'/<'//</, 542 ; of Desor, 118 ; of 

 Dolii-liiiijliiaan.-i kowalevskii,582; oll>ulii-lio- 

 glossus pi'sillus, 583 ; of Domn'in, 200 ; 

 of Echinodermata, 287 ; i-i<ili-i-ii,;ll<i ulmi, 

 207 ; of lusecta, interpretation of, 286-288 ; 

 of Jnliis, 284 : of Lepidoptera, 266 ; of 

 Muscidae, 278 ; of Uphinrn Inn-lap! HH, 

 502 ; of Pantopoda, 243 ; of Pentastomida, 

 242 ; of Sagitta iiipn m-tula, 433 ; Solaxti r 

 endeca, 481, 482 ; of Terdn-nti'l! nn septen- 

 li'ionci.lis, 412 



Larvacea, 568, 608, 646 



Larval adductor muscle of Unio, 352 



Larval arms of Asterias, 464 ; of Balano- 

 glossus, 576 ; of Ei-liiiini-iiniiiijn cordatum, 

 522 ; of EfliiiiHx esculentus, 508-511 ; of 

 riKji/in. 488-490; of Symij>/i> 

 i, 533 



Larval cerebral ganglion of J'iili/gnr<Uii.i 

 appendiculatus, 147 



Larval eyes in grubs of Duryplini-n and 

 Donacia, 261 ; in grubs of Di/fixca*, 273, 

 274 



Larval history of Auomura, 216 ; of 

 Crustacea, 196-220 



Larval kidney, formation of, of Apli/ain, 32-1 ; 

 in Dreissensia, 340 : in Fioiu', 324 : in 

 Opisthobranchiata, 323, 324 ; in Paludina, 

 310, 323 ; in Physa, 323 ; in fresh-water 

 Prosoliranchiata. 323 ; in Pulmonata, 32-". : 

 in Umbrella, 324 



Larval mantle of Unio, modification of, 352 



Larval mesoderm of / J f>///.<//v7//'.s-, 135; "I 

 Mollusca, 323 



Larval phase, definition of, 19; intn juria- 

 tion of, 649 



Larval shell of Acniam, 304 ; of Fiaann-lln. 

 305; of Hiiliiites, 305 ; of M<-nil<f i<ii>f<i, 

 392 ; of Puffin, 300 



Larval skeleton, development of, in AI/IJ>/H'- 

 ura squamata, 198: u\i-li!nii.->-* 

 508-510; mOphiothrixfragilis, 1^7-490 



Larval stages, dftinil ion of, 19 



Lateral chamber of Urticina orassicornis, 

 80 



Lateral eyes, formation of, in i . 232 



2-">4 : in Limulus, 2".7 : in Sn.rpimi, 240 



lateral muscles "I <'y]ihonaiites larva, 393 ; 

 of /'iifi/'/tiriJin* appendicula u . L48 



Lateral nerves of larva of 

 app ( ndiculatus, 1 17 



