INDEX 



767 



HlRUDO QUIXQUESTEIATA See H. MEDI- 

 CINALIS 



Hirudo sangui&uga, 480 

 Histology, 3* 

 Histrio&jWa*, 462, 463 



HiS^nytic, 49 " :; 



Holothuria See Sea-cucumber 



Holothurian See Colochirus 



Holotrichous, 83 



Holozoic, 49" 



Homalogast&r, 242 



Homoccela, 103" 



Hoplonemertea, 270 



HORMIPHORA PLUMOSA, 198 : External 

 characters, 198 : Enteric system, 199, 

 200, 201 : Cell-layers, 202 : Nervous 

 system, 203 : Sense-organs, 203 : Re- 

 productive organs, 203^ Development, 

 204, 205, 206, 207 : J^stematic posi- 

 tion, 208 



House-flies, 586 



Hyalonema, 112, 116 1 



Hybrids, 2 



Hydatids, 261, 262, 266 



Hydatina, 304, 305, 306 



Hydra, 136, 137, 142, 155 



ffydrpctinia, 134, 135, 137, 155 



Hydranths, of Obelia, 119*, 120, 

 122 



Hydrocoele, 360 



Hydrocorallina, 132*, 145, 155 



Hydrocorallinae, distribution, 147 



Hydroids, naked-budded, 133* : covered- 

 budded, 133" 



Hydrophi/iix, 601 



Hydrophyllia, of Halistemma, 149 



Hydrotheca, of Obelia, 119*, 120 



Hydrozoa, 118 : Example, 118 : General 

 structure and classification, 130: Alter- 

 nation of generations, 131 : General 

 remarks on, 155 



Hydrnla, 129, 130, 141*, 144 



Hymenoptera, 587, 589, 593, 594, 596, 

 602, 0<!5 



Hypodermic impregnation, 309, 47^9 _ 



Hypopharynx, 589 



Hypostome, of Obelia, 119* 



Hypotrichous, 83 



I 



I 



CHNEUMONS, 587 



Ichthyophthiriw, 93 



Idmonea, 320 

 Illoricata, 304* 

 Imaginal discs, 602 

 Impregnation, 18*, 19 

 Impregnation, hypodermic, 



Inarticulata, 337* : Shell, 338 



Incurrent canals, of Sponges, 98, 99, 

 108 



Incus (of Rotifera), 307 



Individual differences, in Nereis dumerilii, 

 413 



Individual of the first order, 156* 



Individual of the second order, 156* 



Individual of the third order, 156" 



Individual variations, 2, 104 



Iiidividuation, in Hydrozoa, 155 



Inermia, 455, 457, 461 



Infundibula, of Aurelia, 161 



Infusoria, Definition, 44: Example, 79 : 

 Classification, 82 : Systematic position 

 of example, 82 



Infusoriform embryos, of Dicyemidie, 

 217, 218 



Inhalant pores, 97, 108 



Inhalant siphon, 632 



Ink-sac, of Sepia, 714 



Insecta, 484, 577: Example, 577: Dis- 

 tinctive characters and classification, 

 583 : Systematic position of the 

 example, 587 : General organisation, 

 588 : Exoskeleton, 588 : Head, 58S : 

 Thorax, 588 : Abdomen, 588 : Appen- 

 dages of head, 588 : Appendages of 

 thorax, 590 : Btaemocoele, 591 : Fat 

 body, 592 : Digestive system, 592 : 

 Malpighian tubes, 593 : Tracheal sys- 

 tem, 593 : Blood- vascular system, 5!)4 : 

 Nervous system, 594 : Organs of special 

 sense, 595 : Production of sounds, 597 : 

 Reproductive organs, 597 : Eggs, 598 : 

 Development, 599 : Metamorphosis, 

 600 : Mode of life, 602 : Distribution 

 in time, 604 



Integripalliata, 647 * 



Integripalliate, 650 



Integument See Body- wall 



Inter-filamentar junctions, (537 



Inter-lamellar junctions, 637 



Interstitial cells, of Obelia, 122 



Introvert, of Polyzoa, 322: Sipuncidua t 

 451 : Gephyrea, 455 : Triton, 674 : 

 Gastropoda, 689 



Imagination, 20* 



Iris, 37, 720 



Isomyaria, 649 



Isopoda, 524*, 543, 544, 545, 551 



Isopteryx, 597 



Isopte.ryx apicalix, 597 



CJ AMS, 30 



Jelly-fish, Common (Aurelia aurita), 156 

 Jelly-fishes, 118 

 Jurassic, 7 



