Mammal (Com.) 

 brain, 383 



development. 206, 210 

 digestive tract, 253, 254, 256, 258 

 excretorv" sv'stem. 291 

 external appearance, 29 

 heart, development, 340 

 Itings, 280 



nervous system, development, 383 

 pituitary', 379 

 skin. 218, 219 

 urogenital system, 319 

 veins 



body, 368 

 head, 360, 361, J6^ 

 vertebrae, U\J42, 143, 144, 

 Mammars- gland, 29. 217. 219. 221 

 marsupials, 220 

 monotremes. 220 

 Mammary hairs. 219, 220 

 Mammillars' body, 284 

 Man, see human 

 Manatee, 141 



Mandible, 37, 41, 44, 46, 49, 72, 83, 86, 1 19, 

 127 

 adductor process, 119 

 coronoid process. 41 

 Mandibular branch of trigeminal ner\-e (V3), 



386 

 Mandibular division of hyoid line, 410 

 Mandibular hemibranch, 288 

 Mandibular rays, 125 

 Mandibular vein. 361 



Mams (pangolin), epidermal scale. 218, 219 

 Manubrial process of Malleus, 53 

 Manus, 178 



Cryptobramhus, 178 

 Eryops. 179 

 Ophiacodon, 175 

 Sphenodon, 175 

 Tupinambts, 175 

 Margin of overgrowth, 201 

 Marginal canal, 302, 307 

 Marginal cirri, 197 

 Marginal gulars, 98 

 Marginal process, 57 

 Marsipobranch. 139.289 

 Marsupials (see also opossum). 22. 171, 255, 

 291. 293. 294, 320 

 external appearance, 29 

 Marsupial bone. 172 

 Marsupium. 220 

 Martin, 291 

 Massa intermedia, 388 

 Mastoid foramen, 51 

 Mastoid process, 46, 49 

 Maturation, see gametogenesis 

 Mauthner's cells, 394 

 Maxilla, 39, 43, 45, 64, 79, 83, 85 

 origin in teleost, 1 1 1 

 zygomatic process. 38 

 Maxillary branch of trigeminal nerve (V2), 



386 ' 

 Mazon Creek, 88 

 Meatus, auditory, 51 

 MECKEL, 3 

 Meckelian fenestra. 88 

 Meckelian ossicle, 106 



Meckel's cartilage, 53, 64, 80, 84, 106, 107, 



119, 122, 127 

 Meckel's tract, 253 

 Medial cuneiform, 173 

 Medial rostral, 114 

 Medial ventral plate, 1 84 

 Median eyes, 405 

 Median fins, 166 

 Median rostral, 105 

 Mediastinum, 280 



Medullary cells of sex cords, 320, 327 

 Medullary plate, see neural plate 

 Medullarv substance, 291 

 Megalecithal, 201 

 Megamolgophis. vertebrae, 151, 153 

 Meiosis, 193, 194 

 Meissner's plexus, 387 

 Melanin, 218 

 Melanoblasts. 218 

 Meninges. 408 

 Mental, 64, 80, 83. 106. 127 

 Mental branch of common carotid, 356 

 Mental branch of facial nerve, 390 

 Merlucius. tooth, 248 

 Meroblasuc cleavage 

 discoidal. 194 

 superficial. 194 

 Mesencephalon, 383, 384 

 MesenchvTne, 13, 420 

 Mesenteric veins enclosing arteries, 375 

 Mesentoderm. 199 

 Mesethmoid. 105, 106, 111 

 Mesobronchus, 281 

 Mesocoel. 13 

 Mesocoracoid, 181 

 Mesodentine. 228, 229, 233 

 Mesoderm, 199. 208, .30/ 

 development of 

 tunicate, 12 

 enteropneust, 16 

 head, 207 

 lateral plate, 199 

 Mesolecithal egg, 193, 194. 199 

 Mesonephric duct, see nephric duct 

 Mesonephric tubule, stages of development, 



294 

 Mesonephros, 293, 294 

 Mesopterv'gium, 181. 183 

 Mesorchium. 309, 318 

 Mesosome, 12, 14 

 Mesozoic, 62, 283 

 Metacarpals. 171 

 Metacoel. 13 



Metamorphosis, 11, 84, 196, 197, 443 

 Metanephros, 293, 294, 296, 297 



development. 294, 295 

 Metapleural folds. 6, 196 

 Metapterygium, 181, 183 

 Metapterygoid, 106, 125 

 Metasome, 12, 14 



Metasterntmi, or xiphistemum. 191 

 Metatarsal, 172 

 Metatheria (Marsupialia), 43 

 Metaviviparous, 211 

 Metencephalon, 383, 385 

 Metopodium, 172 

 Metoptic pillar, 71,80, 131 

 Metotic fissure, 51, 61 



MiaogaU, 141 



Micromeres. 194 



Micropyle. 198 



Microsaur, 178 



Middle-ear cavity, 406 



Middle meningeal arter\% 354 



Middle pit line, 410 



MIKLUCHO-MACL.AY. 285 



Milk line, 220 



Milk ridges, 220 



Milk teeth, 251 



Millerettidae, millerosauria (see also Eo- 



suchia), 89, 91 

 Minor calyx, 291 

 Minor comu. 36 

 Miocene, 62 

 Mississippian, 63, 88 

 MIVART. 186 

 Molar, 251 

 Molariform teeth. 41 

 Molar teeth, 39 

 Mole, 22 

 Monkey. 212 

 Monocytes, 377 

 Monopneumonous, 283 

 Monophyletic origin of reptiles, 91 

 Monophvlogenv of mammals, 76 

 Monotremes, 22, 171, 172, 211, 254, 291, 

 293, 294. 320, 322, 362, 384 

 chondrocranium of. 55 

 egg laying, 29 

 external appearance. 29 

 head skeleton, development, 60 

 urogenital system, 323 

 Mordacm. 405 

 Morula, 208 

 MormvTidae, 420 

 Mosasaur, 166 

 Motor nerve, 386 

 Mouse, 293 

 Mouth, 5, 9, 11, 12, 16, 23, 196, 199, 201, 



205, 253 

 Mojthomasia, 112, 114 

 Mucous-canal reticulum, 410 

 Mucous cells, 225, 226 

 Mucous net, 8 

 MULLER, 139 



Mullerian duct, 299, 319, 321, 382 

 Multipolar cells, osteocytes, 229 

 Multipolar ingression. 207 

 Muscle naming. 430 

 Muscles, see specific name 

 Muscles, body wall, 1 1 

 development, 431. 432 

 eye, 423 



general observations, 441 

 innervation, 431 

 nonmyotomic, 9 

 pectoral appendage, 424 

 pelvic appendage, 428 

 segments (myomeres), 6 

 synonymy. 440 



transverse fibers, amphioxus. 6 

 Musculocutaneous artery, 349 

 MmUlus, 273, 285, 286, 334, 351, 359, 422 

 Myelencephalon, 385 

 Myelonal vein, 365 

 Myeloid tissue, 378 



INDEX • 469 



