88 i 



INDEX. 



Hylotoma 758. 



Hymenaster 192 1 , form 

 of body 168. 



Hymenitis 712 1 . 



Hymenocaris 358 2 . 



Hymenocera 533 2 . 



Hymenodiscus 193. 



Hymenodora 531 2 . 



Hymenopenaeus 529 l . 



Hymenoptera 754. 



Hymenopus 668 2 . 



Hymenosoma 547 2 . 



Hyocrea 823 '. 



Hyocrinus 302 l , arm 

 278, basals 276, cover- 

 ing plates 281, orals, 

 mouth 280, pinnules 

 279. 



Hyosura 488 2 . 



Hypanthocrinus 297. 



Hypererythrops 471 2 . 



Hyperia 494, 503 2 . 



Hyperina 502'. 



Hyphalaster 189 2 . 



Hypnodes 406 2 . 



Hypnorma 668 '. 



Hypobythius 28 1 . 



Hypochilus 820 1 . 



Hypochthonius 848 1 . 



Hypochtonus 810 1 . 



Hypoderma 752 2 . 



Hypognatha 824 1 . 



Hyponomeuta 642. 



Hypopharynx, Insect 

 611. 



Hypopus 847. 



Hypostereom 307. 



Hypostoma 583, Crus- 

 tacea 343, Trilobita 

 364. 



Hypostome 849 l . 



Hypozyal 283. 



Hypsidae 718 2 . 



Hypsiechinus 242 1 . 



Hyptiotes 820 1 . 



Hypurgon 36 1 . 



Hystricrinus 296 1 . 



lasis 49 !, 54. 



Ibacus 535 1 . 



Ibla 424 1 , caudal fork 



of 420, dimorphism 



354, 422. 



Ichneumon-flies 760. 

 Ichthyocrinus 298 1 . 

 Ichthyoxenus 489-. 

 Icilius 500 2 . 

 Iconaster 190 1 . 



Icridium 500 2 . 



Idolum 669 1 . 



Idomene 405 2 . 



Idotea 488 2 . 



Ihocrinus 294 2 . 



Ilariona 245 2 . 



Ileum 626. 



Iliodaemon 267 1 , stone- 

 canal 254. 



Ilyarachna 488 '. 



Ilyaster 189 2 . 



Ilyocryptus 381 2 . 



Ilyodromus 391. 



Imaginal discs 651. 



Imago 639. 



Inachus 545 2 , action of 

 Sacculina on 432, 

 effect of parasites on 

 446. 



Inadunata fistulata 293 2 . 



Inadunata larviformia 

 293 1 . 



Indo-Pac =Indo Pacific. 



Infer-radial 277. 



Infrabasal plates Echi- 

 noderms 121. 



Infrabasals Crinoids 

 275. 



Infulaster 247. 



Infundibula 30 2 . 



Ino 716 1 . 



Inocellia 702'. 



Insecta 608, somites 

 317, head and brain 

 321, maxillulae 322, 

 chordotonal organs 

 338, segmentation 

 608, typical seg- 

 ment 610, head 610, 

 thorax 611, wings 

 613, abdomen 616, 

 appendages 617, ali- 

 mentary canal 623, 

 saliva 625, glands 

 salivary, silk, caecal 

 627, excretory organs 



627, vascular system 



628, fat-body, peri- 

 cardial cells, phos- 

 phorescent organs, 

 oenocyte-cells 629, 

 respiratory system 

 630, trachea! gills, 

 anal respiration 632, 

 nervous system 633, 

 sense-organs 635, re- 

 productive organs 637, 

 development 639, par- 

 thenogenesis 640, ovi- 



position 640, poly- 

 em bryony 641, meta- 

 morphosis 648, larva 

 650, pupa 651, palae- 

 ontology ,653, classi- 

 fication 654, marine 

 657, oceanic 693 l . 



Instar 654 2 . 



Interambulacral plates 

 171, Crinoids 280, 

 Echinoids 211. 



Intercalated segment 

 320. 



Interprimibrachs 278. 



Interradials Crinoids 

 278, incorporation in 

 calyx 278. 



Interradii Echinoderms 

 117. 



Interrupted interambu- 

 lacra 217. 



Intersecundibrachs 278. 



Intestinal pores Balano- 

 glossida 79. 



lodes 719 1 . 



lomachus 806 2 . 



lone 491 2 , pleopods of 

 482. 



Iphimedia 501 1 . 



Iphinoe 476. 



Iris pigment cells 330. 



Irpa 267 2 , stone-canal 

 254. 



Isaea 501 2 . 



Ischnocolus 819. 



Ischnogrades 406 2 . 



Ischnosoma 488'. 



Ischnurus 806 2 . 



Ischyropsalis 842 2 . 



Isias 405 1 . 



Ismailia 409 2 . 



Isochaeta 405 1 . 



Isocrinus 301 l . 



Isogenus 677 \ 



Isolated plate 211. 



Isometroides 806 2 . 



Isometrus 806 2 . 



Isopoda 479, parasite 

 of 410 2 . 



Isopoda anomala 491. 



Isoptera 678. 



Isopteryx 677 1 . 



Isotoma 657. 



Itch mites 852 l . 



Ithomia711, 712 '. 



Ityraera 697 '. 



lurus 807. 



Ixa 544'. 



Ixodes 845, 849, 850 1 . 



