770 



INDEX 



Monogenetica, 238% 2.50, 252, 253, 254, 

 256 



Monomyaria, 649 



Monosiga, 72 



Jlonotiis, 240 



Monozoa, 238* 



Morphology, 3 



^orula, 20* 



Mosquitoes, 586, 590 



Mother-cyst, 262 



Moths, 587 



Mouth papilla?, 347* 



Movable cheek, 558* 



Mulberry body, 20* 



Mulldr's larva, 258 



Multicilia, 84, 85 



Multiple fission, of Euylena, 64 



M,n-tx, 693, 696 



Muscle, striated, 26*, 27 : non-striated, 

 26, 27 



Muscle processes, Hydra, 136, 137 



Muscles, 35 



Muscular fibres of sponges, 102 



Muscular system, of Aurdia, 160: Sea- 

 anemone, 174, 175 : Magdlania, 335 : 

 Brachiopoda, 339 : Hirudo, 467, 468 : 

 Apu*, 489: Axtacns, 504, 505: Crus- 

 tacea, 547: Periplamta, 575: Ano- 

 ilohfa, 635 : Pelecypoda, 648 



Muscular tissue, 26*, 27 



Mushroom coral, 192 



Mussels, 631 



Mya, 647 



Mya arenaria, 649 



Mycetozoa, 43* : Example, 61, 62 : Spo- 

 rangium, 62 : Capillitium, 62 : Spores, 

 62 : Magellula, 62 : Plasmodium, 63 : 

 General remarks, 63 : Protomyxa, 63 



Myomeres, of Apus, 490 



Myriapoda, 484 



Myriapoda, 566 : Distinctive characters 

 and classification, 566 : General organ- 

 isation, 567 : External features, 567 



Myriothela, 137 



Mytis, 523, 537, 553 



Mytilus, 646, 652, 654, 655, 656 



Mi/tilus i-.'litlis, 648, 653 



ifytihu Idtm, 648 



Myxiiluim lii-.htrkiihnli, 78 



Myxdbolus miilleri, 78 



Myxospongiae, 103*, 111, 115 



Myxosporidea, definition, 76 : Character- 

 istic features, 78 



Myzostoma, 448 

 Myzostomida, 448 



N. 



N 



ACRE, 635* 



Naidomorpha, 428* 

 X>*. 446 

 Narcomedusae, 132* 



Natural History, 1* 



Nauplius, 496, 497* 



Xiiiisifhf-i':, 169 



Nautiloids, 750 



NAUTILUS POJIPILIUS. Shell, 725, 726 : 

 External characters of soft parts, 726 : 

 Mantle and mantle-cavity, 729 : En- 

 teric canal, 730 : Heart and circulation, 

 732 : Renal organs, 732 : Nervous 

 system, 734 : Sense-organs, 734 : Re- 

 productive organs, 735 : Systematic 

 position, 737 



X,!t/i(t, 535, 536 



Neck, of cockroach, 573 



Nectocalyx, 149* 



Nekton, 8* 



Nemathelminthes, 221, 275, 297 



Nematocyst, 73, 79, 86, 123* 



Nematoda, 275 : Example, 275, 281* : 

 External characters, 283 : Body-wall, 

 283 : Enteric canal, 283 : Ccelome, 

 284: Nervous system, 285 : Eye-spots. 

 285 : Reproductive organs, 285 : De- 

 velopment, 286, 287 : Life-history. 

 286 



Nematogene, 217* 



Nematoidea, 282*, 284, 285 



Nemertinea, 273* : General features, 

 268-271 : Alimentary canal, 269 : 

 Blood-vessels, 270, 271 : Excretory 

 vessels, 270, 271 : Nervous system, 

 270 : Lateral organs, 269, 271 : Eyes, 

 272 : Otocysts, 273 ; Reproductive 

 system, 273 ; Development, 273 



Neo-crinoidea, 380* 



Xeomtnia, 663, 664, 667, 668 



X>pheUs, 476, 477, 478, 481 



Nephridiopore, 411, 418 



Nephridium, 403, 411*, 412, 423, 440 



Nephridium, provisional, 440 



Nephrostome, 411, 423, 440 



Xtreidfe, 428, 447 



NEREIS, External features, 404 : Enteric 

 canal, 406 : Body-wall, 408 : Vascular 

 system, 409 : Nervous system, 409 : 

 Sense-organs, 410 : Excretory organs, 

 411 : Reproductive organs, 412 : Indi- 

 vidual variation, 413 : Development, 

 413 : Systematic position, 428 



Nerve-cell, 27*, 28 



Nerve-fibres, 27*, 28 



Nervous system, 14, 29, 35* : Obelia, 

 123: Leptolinse, 138: Aurelia, 160: 

 Tealia, 1 79 : Hormiphora, 203 : Planaria, 

 224 : Distomum, 228 : Tania, 233 : 

 Platyhelminthes, 252 : Nemertinea, 

 270: A*<-<t'fix, 279: Nematoda, 285: 

 Acanthocephala, 291 : Cha?tognatha, 

 294 : Brai-hionus, 301 : Rotifera, 308 : 

 Dinophilea, 310 : Gastrotricha, 312 : 

 Polyzoa, 316, 324 : Endoprocta, 326 : 

 PJurronis, 329: Jfayellu nia, 336, 337: 



