710 



Index 



Isopod, 507 



Isoptera, 538 



Isospondyli, 590 



Isotope, 26-27 



Isthmus of thyroid, 228 



Itch mite (see Sarcoptes), 515, 516 



J 



Jacamar, 625 



Jackrabbit, 630, 636, 649 



Janssen, 265 



Japanese beetle, 535 



Japygid, 538 



Jaw, of rotifer, 440 



of squid. 479 



of vertebrate, 53, 56, 57, 100, 108, 

 131 

 Jejunum, 129, 134 

 Jellyfish, 45, 212, 347, 383, 385, 391, 



393, 395 

 Joint, 112-113, 183 

 Jugular vein, 66, 68, 168, 169, 183 

 Juice, digestive, 137, 138, 140, 143 



gastric, 138, 140, 141, 143, 211 



intestinal, 138, 139, 140, 141 



pancreatic, 137, 138, 139, 140, 141, 237 

 Jurassic period, 342, 604, 615, 626, 627 



K 

 Kala azar, 359 

 Kangaroo, 633 

 Kappa material, 315 

 Keratin, 80, 83 

 Ketone, 238 



Kidney, 72, 184, 185, 186, 187, 188, 

 235, 236 



cortex, 187, 188 



function, 186, 189. 190, 248 



medulla, 187, 188 



tubules, 184, 185, 186, 188, 189 

 Killifish, 590 

 Kinesthetic sense, 214 

 King crab (see Limulus), 489, 



510-511 

 King snake, 608 

 Kingdom, animal, 44, 344-348 

 Kingfisher, 619, 625 

 Kinorhyncha, 347, 438, 441-442 

 Kissing bug, 359 

 Kite, 625 

 Kiwi, 625 



Knee jerk, 196, 210 

 Koala, 633 



Komodo dragon, 608 

 Krait, 610 

 Kymograph, 122, 123, 124 



Labeled elements, 27 

 Labella, 528, 529 



Labia major, 261 



minor, 261 

 Labial palps, 473 

 Labium, 519, 521, 522, 527, 528, 529, 



530 

 Labrum, 519, 521, 522 

 Labyrinthodont, 595, 601 

 Lacewing, 539 

 Lachesis, 610 

 Lacinia, 521, 522 

 Lacrimal bone, 103 



gland, 216 



lake, 216 

 Lacrymaria, 372 

 Lactase, 139 

 Lactation, 242, 246, 247 

 Lacteal, 183 



Lactic acid, 121, 126, 153 

 Lactogenic hormone, 246-247 

 Lacuna, of bones, 96, 97 



of Nemertina, 421 

 Ladybird beetle. 535 

 Lagomorpha, 630, 635-636 

 Lake, 660-663 



temperature relationships, 661-663 



trout, 574, 588 

 Lamarck, 322, 326 

 Lambdoidal ridge, 103 

 Lamella, of bone, 96, 97 



of gills, 474 

 Lamp shell (see Brachiopoda), 348, 



484 

 Lamprey eej, 46, 567, 570, 571-575 

 Lampropeltis, 608 

 Lantern fish, 590 

 Lappet, 394 



Large intestine, 61, 134-135, 139 

 Larva, axoloti, 231, 597 



of frog, 134 



of insect, 520 



Larvacea, 561 

 Larynx, 54, 149. 151 

 Lateral line. 78. 212. 571. 583 

 Latimeria, 569, 583, 591 

 Latrodectus, 512, 515 

 Laurer's canal, 413 

 Law, biogenetic, 508. 647 



embryonic development. 324 



independent assortment, 303 



recapitulation, 647 



segregation, 298 



use and disuse. 326 

 Leaf hopper. 535. 539 

 Learning. 210. 218 

 Leatherback. 606 



Leech, 45, 446 (sec also Hirudinea) 

 Leeuwenhoek, 266, 278, 349 

 Left-handedness, 318 



