Macrogametes, see Female gametes 



Macromeres, 248 



Macrurous type, 362 



Madreporic vesicle, 559; 551, 564 



Madreporite, 551; 547, 552, 560, 

 564, 566, 570, 572, 577, 580 



Magellania {Waldheimid) flavescens, 

 538 



Maia, 374 



Malacobdella, 208 



Malacocotylea, 194; 191 



Malacostraca, 347; 294, 300, 307, 

 309, 311, 312, 314 



Malaria, 86 



Malaria parasite, see Plas?nodiutn 



Male eggs of Rotifera, 213 



Male gametes, 26 ; of Metazoa, see 

 Spermatozoa ; of Porifera, 1 1 1 ; of 

 Protozoa, 26, 27, 28, 29, 29, 78, 80, 

 84, 85, 86, 87, 91 



Mallophaga, 423 



Malpighian tubules, 279 ; of Arach- 

 nida*, 279, 280,445, 452, 458, 468 ; 

 of Insecta,279,28o,39o; ofMyria- 

 poda*, 279, 280, 378, 381 



Mandibles, 271; of Crustacea, 271, 

 296, 302; of Insecta, 271, 383; of 

 Myriapoda*, 271, 377, 379. See 

 also Mouth parts 



Mandibular groove, 296 



Mandibular palps, 302, 331, 333, 

 334, 340, 348, 355, 358, 368 



Mantis, 385 



Mantle, of Brachiopoda, 537, 539, 

 540, 542 ; of Cirripedia*, 297, 338, 

 340, 341, 344, 347; of Mollusca*, 

 470, 471, 472, 474, 479, 482, 490, 

 492, 494, 498, 499, 501, 502, 503, 

 505, 506,511, 515, 519, 525, 527; 

 of Tunicata*, 592, 602 



Mantle cavity, see Mantle 



Mantle flap, see Mantle 



Mantle groove, 474 ; 476 



Manubrium, 130, 135, 138, 139, 144, 

 145, 146, 151, 152 



Margellium, 139; 140 



Marginal anchors, 151 



Maricola, 189 



Mass provisioning, 434 n. 



Mastax, 212 



Mastigamoeba, 56 



M. aspera, 57 



Mastigobranchia, 366 

 Mastigophora, 40; 4, 38, 39 



INDEX 629 



Maxillae, 271; of Crustacea, 271, 

 296, 299, 302, 335 ; of Insecta, 383 , 

 384, 385 ; of Myriapoda*, 271, 377, 

 379. See also Mouth parts 



Maxillary glands, 309, 309, 321, 328, 

 334,. 338, 340, 351 



Maxillipeds, 296; of Crustacea*, 

 292-3, 296, 333, 353, 355, 358, 

 361, 368 ; of Lithohius, 378 



Maxillules, 296, 302. See also Mouth 

 parts 



Meandrina, 169 



Mecoptera, 425 



Medusa, 129; 128, 130, 132 



Medusae, 133, 135, 137, 138-40, 

 143, 144-8, 150-7 



Megachromosomes, 22 



Megalopa larva, 372 ; 372 



Megalospheric form, 70 



Meganephridium, 256 



Meganucleus, 21; 19, 22, 39 



Megascolecidae, 253, 256 



Megascolides, 256 



M. australis, 244 



Melanin(s), 517; 85, 307 



Melicerta, 213 



Meloe, 430 



Melolontha, 401 



Membranellae, 14, 97 



Membranipora, 532, 533, 537 



Menopon pallidum, 423 ; 423 



Mertnis, 225 ; 219 



M. nigrescens , 225 



Merogametes, 26, 27, 85 



Meropodite, 300 



Merozoites, see Schizozoites 



Mesenchyme, 121; 122, 123; of 

 Ctenophora, 172; of Echinoder- 

 mata, 555; of Hirudinea, 265; of 

 Nemertea, 207 ; of Platyhelmin- 

 thes, 181 ; of the trochosphere, 248 



Mesenteric caeca, of Aphrodite, 234 ; 

 of Arachnida, 280, 445, 462, 467; 

 of Crustacea*, 308, 320, 328, 340, 

 350, 351, 352, 355, 357, 368; of 

 Echinodermata*, 550, 560, 569, 

 580; of Insecta, 389. See also 

 Digestive gland. Liver 



Mesenteric filaments, 159, 164 



Mesenteries, of Actinozoa, 159, 160, 

 164, 165, 166, 167; of Holothu- 

 roidea, 573 ; of Polychaeta, 251 



Mesenteron (Mid gut), 121; of 

 Crustacea*, 307, 320, 328, 368; of 



