INDEX 



7(57 



HlRCDO QUINQUESTRIATA See H. MEDI- 

 CINALIS 



Hirudo sanr/nisuija, 480 



Histology, 3* 



Histriodrilida', 462, 4(i.'! 



Holarctic, 9 



Holoblastic, 20* 



Holophytic, 49* 



Holothuria See Sea-cucumber 



Holothurian See Colochini* 



Holotrichous, 83 



Holozoic, 49* 



Hoiu'ifoija-'itfr, 242 



Homocoela, 103" 



Hoplonemertea, 270 



HURMIPHOBA i-Lr.MosA, 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 : Systematic posi- 

 tion, 208 



House-flies, 586 



Hya/onema, 112, 116 



Hybrids, 2 



Hydatids, 261, 262, 266 



J f >/</,</ 1 IM, 304, 305, 306 



ffijifm, 136, 137, 142, 155 



Jfi/'h-nrtliila, 134, 135, 137, 155 



Hydranths, of OMin, 119", 120. 

 122 



Hydroccele, 360 



Hydrocorallina, 132", 145, 155 



Hydrocorallinse, distribution, 147 



Hydroids, naked-budded, 133* : covered- 

 budded, 133* 



Hydropliilit*, 601 



Hydrophyllia, of Halistemma, 149 



Hydrotheca, of 0!>efia, 119*, 120 



Hydrozoa, 118: Example, 118: General 

 structure and classification, 130: Alter- 

 nation of generations, 131 : General 

 remarks on, 155 



Hi/drula, 129, 130, 141*, 144 



Hymenoptera, 587, 589, 593, 594, 5!Hi, 

 602, 605 



Hypodermic impregnation, 309, 479 



Hypopharynx, 589 



Hypostome, of Olielia, 119* 



Hypotrichous, 83 



Inarticulata, 337* : Shell, 33s 



incurrent canals, of Sponges, 98, 99, 

 108 



Incus (of Rotifera), 307 



Individual differences, in Xereis chime, ri/ii, 

 413 



Individual of the first order, 156* 



Individual of the second order, 1515" 



Individual of the third order, 156* 



Individual variations, 2, 104 



Individuation, in Hydrozoa, 155 



Inermia, 455, 457, 461 



Infundibula, of Attrelia, 161 



Infusoria, Definition, 44 : Example, 79 : 

 Classification, 82 : Systematic position 

 of example, 82 



Infusoriform embryos, of Dicyemidse, 

 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, 588: 

 Thorax, 588 : Abdomen, 588 : Appen- 

 dages of head, 588 : Appendages of 

 thorax, 590 : Hamioccele, 591 : Fat 

 body, 592 : Digestive system, 592 : 

 Malpighian tubes, 593 : Tracheal sys- 

 tem, 593 : Blood-vascular sj'stem, 594 : 

 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, 637 



Inter-lamellar junctions, 637 



Interstitial cells, of Obelia, 122 



Introvert, of Polyzoa, 322 : Sijnijt<->i/>tx, 

 451 : Gephyrea, 455 : Triton, 674 : 

 Gastropoda, 689 



In vagination, 20* 



Iris, 37, 720 



Isoniyaria, 649 



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



fxnpfi ri/x, 597 



Iso2>(tryx apical ix, 597 



CHNKTMOXS, 587 



n*, 93 

 32') 



Illoricata, 304* 

 Imaginal discs, 602 

 Impregnation, 18*, 19 

 Impregnation, hypodermic, 3d!) 



J 



A MS, 30 



Jelly-fish, Common (Aurelia aurita), 156 

 Jelly-fishes, 118 

 Jurassic, 7 



