INDEX 



801 



Incus (of Rotifera), 319* 

 Individual of the first order, 167* 

 Individual of the second order, 167* 

 Individual of the third order, 167* 

 Individual differences, in Nereis du~ 



merilii, 439 



Individual variations, 2*, 114, 439 

 Individuation, in Hydrozoa, 167 

 Inequilateral valves, 682* 

 Infundibula, of Attrelia, 173* 

 Infundibular canal, 212* 

 Infusoria, 46* : Example, 90 : Classi- 

 fication, 93 : Systematic position of 

 example, 93 

 Infusoriform embryos, of Dicyemidse, 



228, 229* 



Inhalant pores, 107, 118 

 Inhalant siphon, 664 

 Ink-sac, of Sepia, 744 

 Inseeta, 514, 602*, 660, 661, 662 : 

 Example, 603 : Distinctive charac- 

 ters and classification, 615 : Syste- 

 matic position of the example, 621 : 

 General organisation, 621 : Exo- 

 skeleton, 621, 622 : Head, 622 : 

 Thorax, 622 : Abdomen, 623 : Ap- 

 pendages of head, 622, 623, 624 : 

 Appendages of thorax, 624 : Abdo- 

 men, 625 : Hsemoco?le, 625 : Fat 

 body, 625 : Digestive system, 626, 

 627 : Malpighian tubes, 627 : Tra- 

 chea! system, 627 : Blood -vascular 

 system, 627 : Nervous system, 628, 



629 : Organs of special sense, 629, 



630 : Luminous organs, 630 : Pro- 

 duction of sounds, 630 : Reproduc- 

 tive organs, 631 : Eggs, 632 : 

 Development, 632, 633, 634, 635 : 

 Metamorphosis, 634 : Mode of life, 

 636 : Distribution in time, 637 



Integripalliata, 678* 

 Integripalliate, 681* 

 Integument See Body-wall 

 Inter-filamentar junctions, 670 

 Inter-lamellar junctions, 669 

 Inter-mesenteric chambers, 186* 

 Internodes, of Siphonophora, 161 

 Inter-radius, 139* 

 Interstitial cells, of Obelia, 133 

 Intertentacular tube, 344 

 Intestinal caeca, 375, 380* 

 Intestine, 489* 

 Introvert, of Polyzoa, 334 : Sipuncttlus, 



484 : Sipunculoidea, 488 : Triton, 



705 : Gastropoda, 724 

 Invagination, 24* 

 Iridocytes, 741* 

 Iris, 40, 750* 

 Irritabilitv, 11* 

 Isomyaria^ 680* 

 Isopoda, 554*, 569, 570, 571, 572, 578, 



581, 582, 587, 660 

 Isoptera, 617* 



/ APYX, 616 



Jaws, 33 



Jelly-fish, Common (Aurelia aurita), 167 



Jelly-fishes, 129 



Johnston's organs, 630* 



Jurassic, 7 



K 



K 



.ARYOGAMY, 61, 78* 



Karyokinesis, 18 

 Keber's organ, 672, 688 

 Kidneys See Excretory system 

 Kinetonucleus, 72*, 74 

 King-Crabs, 637, 646, 650, 651 

 Kingdom, 5* 

 Koonunqa, 553 

 Kraussina, 360 

 Krolmia, 310 



_LjABiAL PALPS, 605 : of Pelecypoda, 



668 



Labium, 605 

 Labrum, 604 : of Apus, 516 : of Astacus, 



529 : of Periplaneta, 604 : of Scorpion, 



639 



Labyrinthula, 67 

 Lacinia, 605 

 Lacrymaria, 96 

 Lacteals, 35 

 Lacunae (bone), 28* 

 Lacunar system, 373 

 Laijena, 54 



Lamellae (of bone), 28, 29 

 Lampetia, 214, 219 

 Lamp -shells, 353 

 Lancet plate, 405 

 Land -snails, 715 

 Lantern ccelome, 392 

 Laomedea, 140 



Lappets, of Sea-anemone, 185 

 Larva, of Desor, 290 

 Larval membranes, of Periplaneta, 613* 

 Larval organ, 383 

 Lateral plane, 210* 

 Latreillia, 576 

 Laurentian, '< 

 Lanrer's canal, 240 

 Laverania, 88 

 Leaf -insects, 617, 621 

 Leda, 677 



Leech See Hirudo 

 Leeches See Qirudinea 

 Lemnisci, 308* 

 Lemnobdella See Hirudo 

 Lens, 40 See Eye 

 Lepas, 551, 563, 564 



3 E* 2 



