12 



Index 



Malleus, 220, 221, 222 

 Mallophaga, 538 



Malpighian layer {see stratum germi- 

 nativum), 54, 55, 79 

 tubule, 488, 516, 517, 519, 525 

 Maltase, 139 



Malthus, 322, 327, 667, 668 

 Mammalia, 626-643 

 characteristics of, 628-629 

 classification, 44, 46, 348, 561, 567, 



629-630 

 embryology, 281, 290-292 

 fertilization of egg, 277 

 orders, 630-643 

 organ systems, 47-264 

 origin of, 612, 614 

 parental care, 254 

 sex determination, 308 

 twinning, 295 

 Mammal-like reptile {see Synapsida), 



604, 612 

 Mammalogy, 21 



Mammary gland, 79, 81, 246-247, 262 

 Mammillary body, 200 

 Man, chromosome number, 272 

 classification, 44, 45, 559, 630, 635 

 development, 640-643 

 gestation, 263 

 organ systems, 47-264 

 parasites, 411, 418-420, 413, 414, 

 430-438, 463 

 Manatee, 630, 639 



Mandible, of Cambarus, 495, 496, 498 

 of insects, 519, 521, 522, 527, 528, 529, 



530 

 of vertebrate, 101, 103, 150 

 Mange, 516 



Manis, 85, 630, 632, 635 

 Manta ray. 576, 580, 581 

 Mantid, 538 



Mantis shrimp {see Squilla), 507 

 Mantispid, 539 

 Mantle, 467, 473, 478, 562 

 Manubrium, of jellyfish, 393 



of vertebrate, 108 

 Margaropus, 367, 516 

 Marrow, 95-96, 177, 178 



cavity, 93, 95, 97, 98 

 Marsupial, 256, 336 



frog {see Pipa or Gastrotheca) 

 Marsupialia. 627, 629, 631, 633 

 Mastax, 440 

 Mastigophora {see Flagellata), 352, 



353-359, 644 

 Mating behavior, 513, 620-621 



season, 241 

 Matrix of cartilage, 95 

 Matter, 25-29 

 gray, 195, 197 

 white, 195, 198 



Maxilla, 57, 102, 103, 215 

 of Cambarus, 495, 496, 498 

 of insects, 519, 521, 522, 527, 528, 

 529 530 

 Maxilliped, '495, 496, 498 

 Mayfly, 538 

 Meandrina, 397 

 Meckel's cartilage, 57 

 Mediastinum, 153, 162 

 Medicine, 21, 226, 234, 236 



psychosomatic, 211 

 Medulla, of adrenal gland, 207, 234 

 of kidney, 187, 188 

 of ovary, 242 

 Medulla oblongata, 69, 71 

 Medusa, 383, 385, 391, 393, 395 

 Megalops, 508 

 Megaloptera, 539 

 Meganthropus, 642 

 Mehlis's gland, 413 

 Meibomian gland, 81, 216 

 Meiosis, 273-275, 303, 312 

 Melanin, 487 

 Melanogrammus, 588, 590 

 Membrane, basement, 152 

 basilar, 222, 223 

 bone, 100 



cell, 159, 235, 267, 269 

 elastic basement, 405 

 embryonic, 290-292 

 fertilization, 276 

 fibrous, 215 

 nictitating, 52, 216 

 nuclear, 267, 268, 270 

 oval window, 220, 221 

 plasma, 267, 269 

 round window, 220, 221 

 semipermeable, 34 

 tectorial, 222, 223 



theory of nerve conduction, 207-209 

 tympanic, 220, 221, 222 

 vestibular, 222 

 Mendel, 297, 303, 311, 327 



laws of inheritance, 298-306 

 Meninges, 71, 201, 202 

 Meningitis, 202 

 Menopause, 262 



Menstrual cycle, 262, 263, 287 

 Menstruation, 262 

 Mentum, 521, 522 

 Mephitis, 630 

 Meroblastic cleavage, 284 

 Merostomata, 489, 510-511 

 Merozoite, 363, 364, 365, 367 

 Merychippus, 333 

 Mesencephalon, 69, 196, 199 

 Mesenchyme, embryonic, 289 

 Mesenteric artery, 65, 168 



vein, 168 

 Mesentery, 60, 128, 136-137 



