INDEX 



935 



Imago, 309 

 Implantation. 815 

 Incus, 403 

 Inclefensibles, 792 

 Infrared, 699 

 Infundibulum. 158 

 Infusoria, 71 



class, 70 

 Ingestion in amoeba, 87 



in hydra, 151 

 Ingression, polar, 810 

 Inguinal canal, 652. 653 

 Iniomi, suborder, 450 

 Inner cell mass, 816 

 Innominate vein of frog, 508 

 Insect characteristics, 301 

 Insecta, class, 265, 300 

 Insectivora, order, 619 

 Insects, economic relations. 340 



hemimetabolous, 320 



holometabolus, 321 



nerve winged, 322 



representative. 343 



shellac scale, 341 



social life, 334 

 Inspiration, 648 

 Instinct, 846. 852 

 Insulin, 677 

 Integument, 377 

 Integumentary system, lOS 

 Interambulacral plates, 219. 220 

 Interauricular septum, 510 

 Intercalary disks, 107 

 Intercellular digestion. 151 

 Intercostal muscles. 581 

 Intermedin. 678 

 Internal carotid artery, 433 

 Interradial pouches. 222 

 Interstitial cell, 149, 150 

 Intem'ertebral discs. 643 

 Interzonal fibers. 62 

 Intracellular digestion, 119 

 Invertase, 386 

 Iris. 401 



of frog, 529 

 Irritability, 54 

 Ischiopubis, 430 

 Ischium of frog, 521 

 Ischnochiton, 257 



conspicuus. 256 

 Islands of Langerhans, 110, 677 

 Isopoda, order. 265 

 Isoptera, order, 265. 320 

 Isospondyli, subordei-. 447 

 Istiophoridae. family, 453 

 Itch mite, 739 

 Ixodidae, family, 298 



.Tacana spinosa gymnostoma, 591 

 Jaguar, 629 

 .lapanese beetle. 31 

 Japyx hubbardi. 311 

 .Tavelina. 032 

 Jays. 595 

 Jellyfishes. 26 

 .loint snake. .")52 

 Jugular veins of frog, 508 

 Jugulares, suborder. 4.55 

 Julidae. family. 2S9 

 Julus. 289 



Jumping spiders, 290 

 June beetle. 324 

 bug. 354 



life history. 350 

 Jungle fowl, 597 



K 



Kangaroo. 618 



rat, 624 

 Karyolymph, 61 

 Karyoplasm. 61 

 Karyosomes, 61 

 Katydids, 315 

 Keratosis, 838 

 Kerona, 71 

 Kidneys, 398 



of cat, 650 

 Killdeers, 590, 591 

 Killifishes, 441 

 King crab, 266 

 Kingbirds, 595 

 Kingfisher, 593. 594 

 Kinosternidae, family, 548 

 Kissing bug, 79 

 Kiwi, 582, 585 



Labia minor, 320 



Labial palps, 357 



Labium. 345 



La Brea asphalt pits, 861 



Labrum, 345, 357 



Lacertilia, suborder, 547, 551 



Lacewings, 322 



Lacinia, 345. 305 



Lacrimal bone. 407. 643 



Lacrymaria. 71 



Lactase, 3S6 



Lacteals. 513 



Lactogenic hormone, 678 



Ladybird beetles, 324 



Ladyfishes. 448 



Lagena, 437, 60S 



Lagomorpha, order, 625 



Lamarck, 43 



Lamprey, 413 



larva. 420 



life history, 421 

 Lampreys. 410 

 Lampsilis. 248 



anodontoides. 249. 254 

 Langerhans. islands of, 677 

 Larva, hexacanth. 764 

 Larvacea, 361 

 Laryngeal chamber. 564 

 Lasius. 340 



Lateral line system. 470 

 Latrodectus. 293 



mactans, 295 

 Laveran and Manson. 79 

 Leaf hoppers. 320 



roller, strawberry, 328 

 Leber's atrophy, 832 

 Leeuwenhoek, 49 

 Lemuroidea, suborder. 035 

 Lemurs. 635 

 Lens. 401 

 Leopard. 629 

 I^epas. 265 



Lepidoptera, order, 266, 325 

 Lepidosaphes becki, 320 

 Lepidosiren paradoxa. 455 

 Lepidosirenidae, family, 455 

 Lepidurus. 204 

 Lepisma saccharina. 310 

 Lepismidae. family. 310 

 Lepisosteidae. family. 447 

 Leplodactylidae, family. 485 

 Leptinotarsa decimlineata. 323 

 Leptocoris trivittatus. 318 

 Leptodea fragilis. 248 

 T>eptodora. 264 

 Lepton squamosum, 239 

 I^eptosynapta. 224 

 Leptotyphlopldae, family, 557 



