INDEX 



617 



Mesoderm, 202, 203, 210, 349, 384, 

 47 5795 vertebral and lateral 

 plates of, 584 



Mesodermal segments, 584 



Mesogloea, 298, 311, 314, 317 



Mesonephros, 591, 592 



Metabolism, 149, 236 



Metacarpus, 50, 502 



Metacromion, 500 



Metamere, Metameric segmenta- 

 tion, 327, 360, 368 



Metamorphosis, n, 209, 276, and 

 see Larva 



Metanephros, 591, 594 



Metapleural folds, 421 



Metatarsus, 51, 505 



Metazoa, 292 



Metencephalon, see Medulla ob- 

 longata 



Microgamete, 275, 287 



Micrometer, 121 



Micromillimetre (/*) = iTnnr of a 

 millimetre, or ^-^p of an inch 



Micronucleus, 265, 269 



Micropyle, 415, 564, 571 



Microtome, 138 



Microzooid, 250, 275 



Mid -brain, 202, 584 



Mid-gut, 371 



Milk-glands, see Glands 



Milk-teeth, 510 



Milt, see Spermatic fluid 



Mitosis, 562 



Molars, 509 



Mollusca, 220, 411 



MONADS : occurrence and general 

 characters, 256 ; movements, 256 ; 

 nutrition, 256 ; animals or- plants? 

 257 ; rapid multiplication, 289 ; 

 practical directions, 260 . 



MONOCYSTIS : occurrence, 284 ; 

 structure, 285 ; parasitic nutri- 

 tion, 286 ; conjugation and repro- 

 duction, 286, 287 ; encystation 

 and spore-formation, 285, 286 ; 

 means of dispersal, 287 ; practical 

 directions, 293 



Monoecious, 307 



Morphology, 217 



Morula, see Polyplast 



Mother of pearl, see Nacre 

 Mounting sections, directions for, 



139 

 Mouth, 4, 16, 253, 265, 271, 295, 



311, 315, 370, 401, 421, 43I 5 486 

 Mouth-cavity, see Buccal cavity 

 Movement, spontaneous, volun- 

 tary, and involuntary, 7, n, 112, 



172, 232, 319, 334, 433; and 



see under various types 

 Mucous membrane, 17 

 Mule, see Hybrid 

 Mlillerian duct, 466, 594 

 Multinucleate, 281 

 Muscle-fibres: striped, 112; un- 



striped, in, 131, 133; and see 



under various types 

 Muscle-processes, 298, 304, 311,318 

 Muscles : Frog, 18, 57, 59, 63, 205 ; 



Obelia, 311 ; Earthworm, 329; 



Crayfish, 369 ; Mussel, 399, 400 ; 



Rabbit, 505 ; and see Myomere 

 Muscles : of eye, 186, 465, 534 ; 



of middle ear, 536 

 Muscles, papillary, 521 

 Muscular contraction, 160, 272 

 Muscular impressions on shell, 



399 

 Muscular layers of enteric canal, 



70, 75 



Muscular system, see under various 

 types ; development of, in Verte- 

 brates, 203, 584, 594 



Muscularis mucosse, 132 



MUSSEL : general characters, 396, 

 412 ; mantle, shell, and foot, 396. 

 412 ; food-current, 404, 412 ; 

 gills, 397, 401, 414 ; muscles, 

 399, 400, 413 ; enteric canal, 401, 

 416 ; nephridia, 406, -//jf ; blood - 

 system, 407, 414 ; nervous system, 

 408, 415 ; sense-organs, 409, 

 416 ; gonads, 409, 41^ ; develop- 

 ment and metamorphosis, 410, 



4*5* 579 



Mustelus, 431, 470 

 Myocomma, 434 

 Myomere, 203, 369, 419, 423, 



434 

 Myophan layer, 264 



