yio 



INDEX 



Monograpttis , 170; 170, 172 



Monomorium mhiimiitn, 501 



Mononchus, 248 n. 



Monopylaea, 80 



Monosiga, 65 ; brevipes, 65 



Monothalamia, 72 



Monotocardia, 563 ; 552, 565 



Monstrilla, 374 



Montipora, 192 



Mosaic disease, 474 



Mosaic vision, 313 



Motile organs of Protozoa, 14 



Moulting, 250, 257, 309, 373, 454 . 



Mouth, Position and shape of, in 

 Arthropoda, 309 ; in ascidian tad- 

 pole, 675, 677 ; in Balanoglossus, 

 663; in Brachiopoda, 615; in 

 Chilopoda, 420; in Coelenterata*, 

 150, 151, 152, 160, 161, 165, 166, 

 174, 179, 182, 191, 194; in Echino- 

 dermata*, 623, 625, 631, 640, 647, 

 655; in Helix, 555; in Hirudinea, 

 296; in Hydatina, 239; in Insecta, 

 426; in Lepas, 379; in Peripatus, 

 319; in Platyhelminthes*, 198, 

 214, 215, 216, 217; in Protozoa*, 

 19, 103, 107; in Trilobita, 323; in 

 Triploblastica, 130, 144 



Mouth, see also Alimentary canal 



Mouth parts (limb-jaws and lips), of 

 Arthropoda, 305, 308; of Crus- 

 tacea*, 308, 339, 354, 356, 364, 



369, 372, 374, 379, 387, 397, 398, 

 401,402, 410,411 ; of Insecta*, 308, 

 426, 427, 428, 463, 465, 466, 468, 

 469, 471, 472, 474, 475, 477, 481, 

 483, 485, 486, 487, 489, 490, 492, 

 496, 506, 507, 509, 511, 512; of 

 Myriapoda*, 308, 420, 422; of 

 Onychophora, 318 



Mucous glands of Helix, 561 



Muggiaea, 166, 167 



Miiller's larva, 216; 145, 215 



Midticilia, 60 



Multiple fission of Protozoa*, 28, 36, 

 54, 64, 72, 76, 88, 89, 93, 95 



Murex, 566; 559 n. 



Musca, 506, 508, 512; domestica, 

 508 



Muscle(s), Alary, 437, 438; Adduc- 

 tor, see Adductor muscles ; Colu- 

 mella, 555; Retractor, see Re- 

 tractor muscles. See also Muscula- 

 ture 



Muscle fibres, 128, 142; of Arthro- 

 poda, 316; of Chaetognatha, 618; 

 of Coelenterata*, 147, 151, 176; 

 of Nematoda, 244; of Pecten, 585 ; 

 of Peripatus, 316; of Platyhel- 

 minthes, 204 



Muscular gland organ, 211 



Musculature, of Actinozoa*, 182, 

 187, 188; of Arthropoda, 305; of 

 ascidian tadpole, 675 ; of Aster- 

 oidea, 634; of Brachiopoda, 615; 

 of Cephalopoda, 589; of Chaeto- 

 gnatha, 618; of Chaetopoda, 261, 

 262, 266, 272 ; of Ciona, 669 , of 

 Crinoidea, 656; of Ctenophora, 

 195 ; of Echinoidea, 641, 644, 645 ; 

 of Gasteropoda, 555 ; of gill books 

 and lungs, 517, 518; of Hirudinea, 

 298; of Holothuroidea, 649, 650; 

 of Medusae, 151, 156, 176, 179; of 

 Metazoa, 142; of Nematoda, 244, 

 246; of Nemertea, 235; of Ony- 

 chophora, 308, 317; of Ophiu- 

 roidea, 638, 639; of Polyzoa, 608; 

 of Platyhelminthes, 202 ; of Roti- 

 fera, 237 ; of Thaliacea, 682 ; of 

 the trochosphere, 285 ; of wings, 



430, 431 

 Mutations, 36 

 Mutilla, 503 

 Mutual fertilization, by Ciliophora, 



33 ; by Helix, 561 ; by Oligochaeta, 



289; by Platyhelminthes, 211 

 Mya, 579 



Mycetozoa, 86; 8, 11 

 My gale, 530 

 Myoblast, 204 

 Myonemes, 17 

 Myophrisks, 81 

 Myopsida, 589 

 Myrianida, 268 ; 264, 278 

 Myriapoda, 418; 308 

 Mysidacea, 393 ; 387, 388 

 Mysis, 393; 332, 394; relicta, 388 

 '^ My sis" larva, see Schizopod larva 

 Mytilus, 583 ; 548, 574, 575, 577, 579, 



580, 581 

 Myxobolus, 100; 43 

 Myxospongiae, 127 and n. 

 Myxosporidia, 100 



Nacreous layer, 546 



Naegleria, 69 ; 25 ; bistadialis, 69 ; 23 



Narcomedusae, 164; 153 



