INDEX 



748 



Keratin, 135, 313, 505, 508, 528 

 Keilin, D., 148 

 Kerona, 147 

 Kidneys, 539, 615 



of dogfish. 333 



of frog, 377 



of mussel, 278 



of pigeon, 413 



of rabbit, 455 



of snail, 268 

 Killer, 705 

 Kinetism, 583 

 Kinetonucleus, 65 

 Kiwi, 415 

 Knee-cap, 438 



Labellum, 243, 244 



Labial palp of cockroach, 229 



Labium of cockroach, 229, 233 



of other insects, 240 



of mussel, 274 

 Labrum of cockroach, 228 



of crayfish, 203 



of Diptera, 242 



of hemipteran, 241 



of insects, 240 

 Labyrinth — 



auditory, of dogfish, 342 

 of frog, 390 

 of pigeon, 415 

 of rabbit, 468 

 of tadpole, 639 



carotid, 373, 601 

 Lacerta, 550, 601. See Lizard 

 Lacewings, 254 

 Lacinia, 229 

 Lactic acid produced from glycogen, 



II. 471 

 Lacunae of bone, 518 



Lagena, 390 



Lagomorpha, 483, 484 



Lamarck, J. B. de, 725 



Lamella, structureless, 90, 105 



Lamellae of bone, 518 



of gills of mussel, 274 

 Lamellibranchiata, 284 

 Lamina terminalis, 387, 608 

 Lampetra fluviatilis, 543 

 Lamprey, 542, 553 

 Lancelet, 2gg, 310, 551, 552 



alimentary system of, 302 



atrium of, 300 



development of, 620 



embryology of, 620 



external features and habits of, 298 



gastrulation of, 621 



general anatomy of, 301 



larva of, 625 



Lancelet, nephridia, 305 



nervous system of, 307 



reproductive organs of, 309 



respiration of, 307 



sense organs of, 308 



vascular system of, 306 

 Large intestine, 443 

 Larva, 24s, 247, 345 



apodous, 247 



campodeiform, 247 



cruciform, 247 



of lancelet, 625 



oligopod, 247 



polypod, 247 



See also Ammocoete, Bipinnaria, 

 Brachiolaria, Glochidium, 

 Planula, Tadpole, Trocho- 

 sphere 

 Larval excretory organ, 617 

 Larynx, 376, 408, 446 

 Latent bodies of trypanosomes, 67 

 Lateral, 188 



Lateral fin-fold theory, 554 

 Lateral line of dogfish, 344 



plates, 634 

 Latimeria, 547, 713 

 Latin names, 25, 707 

 Laurer-Stieda canal, 123 

 Law, von Baer's, 715 

 Layers, germ, 187, 638, 674 

 Learning, 415 

 Leather-jackets, 260 

 Lecky, W. E. H., 709 

 Leech, medicinal, 179 

 Leeches, 148, 184 

 Legs of Arachnida, 222 



of cockroach, 230 



of crayfish, 201 



of primates, 716 

 See also Limb 

 Leishmania, 67 

 Lens of eye, 342, 465 

 Lepas, 221 

 Lepidoptera, 254 

 Lepidosiren, 546, 590 

 Lepidosteus, 590 

 Lepisma saccharina, 249 

 Lepus, 417. See also Rabbit 

 Lepus euYopcBus, 484 

 Lepus tifnidus, 484 

 Leucilla, 85 

 Leucocytes, 525 

 Leucon, 85 

 Lice. See Louse 

 Life, characteristic features of, i 

 Life, cycle, 4 



Life-history of Ascaris, 140 

 of Aurelia, 114 



