TNDEX 



827 



Microdrili, 466* 



Microgametes, of Flagellata, 76*: Spo- 



rozoa, 84, 85. 86 : Ciliata, 99 

 Microgametocyte, 84, 85 

 Microgro mi a, 50, 56 

 Microkpdra, L48, 167 

 Micromeres, of Ctenophora, 217, 218 

 Micromeres, of Polyclad, 274 

 Mil ronucleus, of Ciliata, 93 : of Dino- 



flagellata, 78 

 Micronucleus, of Paramwciiun, 88, 89 

 Micropyle, 20 



Micropyle, of Cephalopoda, 798 

 Microspheric forms, 55, 56 

 Microspores, of Railiolaria, 63 

 Microstomnm, '282, 283 

 Microzooid of Vortitelta, 96, 98 

 Mieseher's corpuscles, 88* 

 Migration, 285* 

 Mil tola, 52 

 Millipora, 156 



Milh pora alcieornia, 157, 158 

 .Millipedes, 526, 614, 616 

 Miiu/'t*, 202, 226 

 Miocene, 7 

 Miracidiuni, 244* 

 Mites, 526, 653, 661, 665, 668, 673 

 Mitosis, 16*, 17 

 Mitotic division — See Mitosis 

 Modiola, 698, 702 . 

 Mollusca. 680* : General remarks, 



804 

 Molluscoida, 340* 

 Molluscoida, mutual relationships of the 



classes, 372 

 Mongrels, 2* 

 Mnniezin, 288 

 Monocyclica, 413* 

 Monocvsiis AOIUS, 80, 81 : Systematic 



position, 82 

 Momecious, 39* 

 Monogenetica, 252*, 258, 259. 966, 268, 



969, - , 72. 273. 277. 2S4. 286, 287 

 Monomyaria. 698* 

 Monosiga, 77 

 Mount us, 255 

 Monozoa, 253* 

 Morphology, 3* 

 Morula, 22* 

 Moruloidea, 230* 

 Mosquitoes, 635, 661 

 Mother-cyst, 282 

 Mother-of-pearl, 684 

 Moths, 635 

 Mouth papilla;, 37<»* 

 Movable cheek, 605* 

 Mulberry body, 22* 

 Multicellular, 19* 

 Multicellular gland, 25* 

 Miiller's larva, 275 

 Mullicilia, 93, 94 

 Multiple fission, of Euglena, 69 

 Mit rex, 744, 747 



Muscle, striated, 28*, 29 : non-striated, 

 28*, 29 



Muscle processes, Hydra, 148 



Muscles, 37* 



Muscular fibres of Sponges, 111 



Muscular system, of Aure/ia, 172 : St a 

 anemone, 186, 188: Magellan in, 364: 

 Brachiopoda, 368: Hirndo, 508, 509: 

 Apt**, 532: Astaaix, 546, 547: Crus- 

 tacea, 593: Periplaneta, 624: Ano- 

 donta, 684 : Pelecypoda, 697 



Muscular tissue, 28*, 29 



Mushroom coral, 205 



Mussels, 680 



Mya, 696 



Mya arenaria, 698 



Mycetozoa, 45* : Example, 66, 67 : Spo- 

 rangium, 66, 67 : Capillitium, 66, 67 : 

 Spores, 66, 67 : Flagellula, 66, 67 : 

 Plasmodium, 66, 67: General remarks, 

 67 : Protomyxa, 67 



Myomeres, of Apus, 532 



Myosoma, 354 



Myriapoda, 526, 614*, 677, 678 : Distinc- 

 tive characters and classification, (ill: 

 General organisation, 614 : External 

 features, 615 : Integument and Body 

 wall, 617 : Alimentary canal, 617 

 Heart, 617: Respiratory system, 617: 

 Nervous system 617 : Reproduction. 

 618 : Ovum, 618: Fossil remains, 618 



Myriothela, 145, 146, 148 



Mysidacea, 567', 581, 582, 594, 597, 599, 

 603 



Mysis, 567, 582 



Mytilus, 695, 697, 702, 703, 7<i8 



Mytiliis eduiis, 697, 702 



Mytiht8 lotus, 697 



Myxidium lieberkuhnii, 87 



Myxoholm midleri, 87 



Myxospongiae, 120, 126 



Myxosporidea. 87* : Characteristic 

 features, 87 



Myzortoma, 489, 490, 491 



Myzostomida, 489*, 490, 491 



N. 



x 



ACM, 684* 



Naiidomorpha. 473 



Xais, 486 



Narcomedusae, 142*, 154, L56 



Natural History, 1* 



Nauplius, 538. 539 



NammtkBt, 18C 



Nautiloids, 680, 790 



Nautilus mocromphaJii", 779, 789 



Nautilus pompilius, 776 : Shell, 776 : 

 External characters of soft parts, 777 : 

 Mantle and mantle-cavit3 r , 781 : Kn- 

 teric canal, 783 : Ccelome, 783 : Heart 

 and circulation, 783 : Renal organs, 

 786 : Nervous system, 787 : Sense- 



