826 



MAGELLANIA, Shell, 360,361: Body, 362: 

 Mantle-lobes, 362 : Mantle-cavity, 

 362: Lophophore, 362, 363; Food- 

 groove, 362 : Digestive organs, 362 : 

 Body-wall, 363 : Muscular system, 364: 

 Ccelome, 365 : Blood system, 365 Ex- 

 cretory organs, 365 : Nervous system, 

 365 : Reproductive organs, 366 : Posi- 

 tion of example, 367 



Magdlania flave.tcens, 360 



Maggot, 649* 



Maia, 569, 596, 600 



Malacocotylea, 252 See Digenetica 



Malacostraca, 565*, 570, 579, 593, 594, 

 596, 597, 601 



Malaria parasites, 86 



Malleus (of Rotifera), 325 



Malpighian tubes, 617, 625 



Malpighian tubes, of Scorpion, 656 : of 

 Arachnida, 668 : of Tardigrada, 675 



Mandibles See Appendages 



Manducation, 434* 



Mantida, 636 



Mantle lobes, 362 



Mantle, of Anodonta, 684 : Pelecypoda, 

 698 : A?nphineura, 713 : Triton, 725 : 

 Gastropoda, 740 : Scaphopoda, 757 : 

 Sepia, 762 : Nautilus, 781 



Manubrium, of Medusa, 129 : of Obelia, 

 130 



Marginal lappets, of Aurelia, 168*, 169, 

 179 



Marginal sense-organs, 135* 



Marginal tentacles, of Aurelia, 168*, 

 169 



Marine Annelids, 439 



Mastax of Rotifera, 325 



Mastigamffiba, 70, 71 



Mastigophora, 45* : Example, 67 : Clas- 

 sification, 69 : General organisation, 

 69: Systematic position of the example, 

 70 



Matrix of connective tissue, 25* 



Maturation, 19*, 20 



Maxilla See Appendages 



Maxillary palp See Appendages 



Maxillipeds See Appendages 



Maxillutse, 638* 



May-flies, 633 



Measly pork, 310 



Medulla, of Actinosphcerium, 57, 58 : 

 Monocystis, 80 : Paramoecium, 88, 89 



Medullary sheath, of Nerve-fibre, 29*, 30 



Medusa-buds, of Obelia, 129 



Medusae, of Obelia, 134, 135 



Megadrili, 466*, 467 



Megagametes, of Flayelfata, 76* : Spo- 



rozoa, 84, 85, 86 : Ciliata, 99 

 Megagametocyte, 84, 85 

 Megalaesthetes, 717 

 Megalopa stage, 599 



Megameres, of Ctenophora, 217, 218 : 

 of Poly clad, 274 - 



Mega nucleus, of Ciliata, 93 : Para' 

 iixrcium, 88, 89 : Dinoflagellata. 78 



Megaspheric forms, 55, 56 



Megaspores, of Radiolaria, 63 



Megazooid, of Vorticetta, 96, 98 



Meleagrina, 696, 710 



Meleayrina margaritifera, 711 



Melicerta, 328, 330, 331 



Melolontha, 643 



Membranes, 24 



Membrauipora, 347 



Mentuni, 622 



Meridional canal, 213 



Meroblastic, 22* 



Merogony, 21* 



Merozoa, 253* See Polyzoa 



Merozoite, 84*, 85, 86 



Mesenchyme, 389 



Mesenteric filaments, of Flaln-lhun, 2G6 : 

 of Sea-anemone, 187* 



Mesenteries, of Sea-anemone, 187, 182* 



Mesenteries, development of, in Seu- 

 anemones, 192, 193 : Arrangement in 

 Actinozoa, 200 ' 



Mesenteron, 187 



Mesoblast, 23* 



Mesocoele, 356* 



Mesoderm, 23*, 219* 



Mesoderm bands, of Peripfaacta, 631 



Mesogloea, 110*, 111: of OMi't, 131* 



Mesonemertini, 296* 



Mesopodium, 725, 739 



Mesosoma, 654* 



Mesostomum, 272 



Mesothorax, 622 



Mesotrochal, 486* 



Mesozoa, 230 



Messmateism See Commensalism 



Metabolism, 13* 



Metacoele, 356* 



Metacrinus interruptus, 424 



Metagenesis, 40* : of Foraminifera, 5(5 : 

 Obelia, 139 : Leptolinae, 152 : Tra- 

 chylinse, 156 : Aurelia, 173 : Liver- 

 Fluke, 243: Tcenia, 250: Platyhel- 

 minthes, 273 : Nematoda, 310 

 Metameres, 43*, 523 

 Metamerism, 523 



Metamorphosis, of Trachylinse, 155: Sea- 

 anemone, 193 : Platyhelminthes, 273 : 

 Nemertinea, 295 : Phoronis, 359 : ^4*- 

 ferina, 388: Antedon, 432: Echino- 

 dermata, 430 : Chastopoda, 487 : Apu*, 

 537 : Crustacea, 597 : Insecta, 649 

 Metamorphosis, retrogressive See De- 

 generation 

 Metanauplius, 539 

 Metanemertini, 296* 

 Metapodium, 725, 739 

 Metathorax, 622 

 Metazoa, 19*, 105 

 Metentera, 187* 

 Micrassthetes, 717 



