766 



INDEX 



Gill-cover, of Astacu*, 49s 



Gills, 33* See Respiration 



Gizzard, 30 



Glabella, 558* 



Glands, 22 



Glands, Multicellular, 23* : Unicellular, 



22 : Ducts, 23 

 Glass-crab, 553 

 Glass-rope sponge, 112, 116 

 Glenodinium, 74 

 Globigerina, 53, 54 

 Glochidium, (544 

 Glossocodon, 142 

 Glow-worms, 596 

 Glycera, 434 

 Glyceridce, 436 

 Gnathobase, 489 

 Gnathobdellida, 476, 480 

 Gnats. 586 



Goblet-shaped bodies, 423 

 Goblet-shaped organs, of Leech, 473 

 Gonads See Reproductive system 

 Gonotheca, of Obelia, 119", 120 

 Gordioidea, 22*, 283|85 

 Gordiun, 283, 284, 286 

 Gorgonacea, 182, 191 

 (,'or'fonia, 184, 191 

 Granule glands, 254, 255 

 Graptolitbida, 132*, 154, 155 

 Grasshoppers, 584 

 Green gland, of Axtacnx, 509 

 Gregarina, 77 

 <,',! (/'i/'iii'i b/aftrtnt/ti, 77 



Gregcvrina dujardini, 77 



Gregarina </i>juuf"t, 77 



Gregarinida, characteristic features, 



77 



Gregarinida, definition, 76 

 (Iroinitt,, 51, 52 

 Guard-polypes, 138'" 

 (Juliet, 30 See Digestive organs 

 diut'/n *jiii< :itffif((, 240, 241 

 Gustatory organ, 37 

 Gymnoblastea, 133* 

 Gynmolaemata, 320 



(.'//-/nrfi*. 187 



Gyrodactylidce, 243 

 Gyrodactylw, 243, 258 



H 



H 



.ABITS See Ethology 

 ffcemadipsct, 476, 481 

 H;enmtochrome, 49, 64 



ir<i'i)1f.tfO'-orcit.-<. 67 



Htemoccele, of Crustacea, 547 



'/>'i.' /is, 561 : Insecta, 591 

 H: inocyanin, 513 

 Haemoglobin, 28, 34 



/In //jo//*/* ror,x, 481 

 Halcaii!j><>i<l< x, 188 



Peri- 



Haliotitf, 693, 694 

 Halixtemma, 147 

 Halistemma tergestinum, 148 

 Halteres, 591 

 Hami)if/t'~i. 459 

 Hartea, 182, 183, 184, 190 

 Harvest-men, 612, 615 

 ffastigerina, 54 

 Haversian canals, 25*, 26 

 Head-lobes, of Astacuts, 516 

 Heart, 34 



Heart See Vascular system 

 Hectocotylisation, 709, 728 

 Heliozoa, 46* : General structure, 55 : 

 Colonies, 56 : Skeleton, 56, 57 : Re- 

 production, 58 : Conjugation 

 Heliopora, 182, 195, 196 

 Helix, 697, 699 

 Helix nemoralia, 690 

 Heinipneustes radiatu*, 390 

 Kemiptera, 585, 589, 605 

 Hepato-pancreas, 32 

 Hermaphrodite, 37x 

 Hermit-crabs, 539, 556 

 Hermit-crabs and Hydractinia, 134, 135 

 Hesionida, 436 

 Heterocoela, 103* 

 HeterocyemidcK, 216, 218 

 Heterogamy, 30*, 287 

 Heterogeny, 259", 266 

 Heteroinita, 67 

 Heteromyaria, 649 

 Heteropoda, 684, 687, 688 

 Heterotrichous, 83 

 Hexacanth embryo, of Timia, 236 : 



Cestodes, 259 

 Hexactinellida, 103*, 116 

 H exact ini<v, 183, 187 

 Hexarthra, 304, 306, 307, 310 

 Hinge-ligament, 633 

 Hinge-line, 633 

 Hinge- teeth, 634, 651 

 Hii>jja, 523 

 Hippuritea, 651, 652 



Hirudinea, 465 : Example, 465 : Distinc- 

 tive characters and classification, 474 : 

 General organisation, 476 : Form and 

 size, 476 : Proboscis, 476 : Enteric 

 canal, 476 : Blood-vessels, 477 : Respir- 

 atory organs, 477 : Nephridia, 477 : 

 Nervous system, 478 : Reproductive 

 organs, 478 : Development, 479 : 

 Habits, distribution, &c., 480 

 Hit'iido, 476, 477, 478 

 HIRUDO MEDICIXALIS, 465 : External 

 characters, 465, 466 : Body-wall, 467 : 

 Muscular system, 467, 468 : Alimentary 

 organs, 468, 469 : Excretory system, 

 470, 471 : Vascular system, 471, 472: 

 Nervous S3'stem, 472 : Sense-organs, 

 472, 473 : Reproductive organs, 473 : 

 Development, 474 : Systematic posi- 

 tion, 476 



