752 



INDEX 



Muscle, extensor and flexor, 201 



fibres, 520, 523 



insertion of, 422, 539 



origin of, 422, 539 



-plate, 628 



spindles, 522 

 Muscle or muscles specified — 



alary, 235 



biceps femoris, 386 



columella, of snail, 266 



eyeball, 341 



gluteal, 479 



intercostal, 446 



obliquus inferior, of eyeball, 



342 

 superior, of eyeball, 341 



of crayfish, 201 



of dogfish, 313 



of earthworm, 160 



of frog, 360, 361 



of lancelet, 300 



of pigeon, 406 



of swan mussel, 271, 273 



pectoralis, 406 



protractor, of mussel, 271, 273 



protractor lentis, 389 



rectus externus or posterior of 

 eyeball, 342, 388 

 inferior, of eyeball, 342 

 internus or anterior of eyeball, 



342 

 superior of eyeball, 342 



retractor bulbi, 388 

 retractor of mussel, 271, 273 



of starfish, 291 

 semimembranosus, 386 

 Muscle fibres. See Muscular tissue 

 Muscular tissue, 520 

 cardiac, 523 

 involuntary, 523 

 of Ascaris, 137 

 of earthworm, 160 

 plain, 523 

 skeletal, 520 

 smooth, 523 

 somatic, 520 

 striated, 520 

 striped, 520 

 unstriped, 523 

 visceral, 523 

 voluntary, 520 

 Musculo-epithelial cells, 90, 92 

 Mussel, swan, 2yo, 284 



anatomy and alimentary system 



of, 275 

 development of, 671 

 excretory organs of, 278 

 external features of, 273 



Mussel, swan, feeding of, 273 



gills of, 274 



gonads of, 279 



life-history of, 281 



locomotion of, 273 



mantle of, 271 



nervous system of, 280 



sense organs of, 281 



shell of, 271 



vascular system of, 279 

 Mussels, freshwater, 270 

 Mustela, 489 

 Mustelidse, 489 

 Mutants, 720 

 Mutation, 720 

 Mutica, 486 

 Myoccele, 628 

 Myocommata, of lancelet, 300 



of dogfish, 314 

 Myelencephalon, 608 

 Myelin, 512 



Myoepithelial cells. See Musculo- 

 epithelial 

 Myofibrils, 520 

 Myohsemoglobin, 522 

 Myomeres of lancelet, 300, 628 



of dogfish, 337 

 Myonemes, 43, 57 

 Myosin, 521 

 Myotome, 564, 628 

 Myriapoda, 222 

 Myxine gluthiosa, 543 



Nacreous layer, 266 



Naiads, 246 



Nails, 528 



Nais, 184, 185 



Names, Latin, 25 



Nares, external, of dogfish, 311 



of dog, 430 



of frog, 346 



of pigeon, 393 

 internal, of Choanichthyes, 546 



of frog, 363 



of pigeon, 406 



of rabbit, 438, 440 

 posterior. See Nares, internal 

 Narial passage, 438 

 Nasal capsules, 316, 352, 404, 425, 



428, 573. 574. 578, 581 

 septum, 427, 438 

 Nasopharynx, 439 

 Natural selection, 719 

 Matrix natrix, 550, 580 

 Nauplius, 219 

 Nautilus, 285 

 Navel, 669 

 Neck of rabbit, 423 



