INDEX 



MAOELLANIA, Shell, 331, 332: Body, 333: 

 Mantle-lobes, 333 ; Mantle-cavity, 333 : 

 Lophophore, 333, 334, 335 : " Food- 

 groove, 333 : Digestive organs, 334 : 

 Body-wall, 335 : Muscular system, 335 : 

 Coelome, 336 : Blood system, 336 : Ex- 

 cretory organs, 337 : Nervous system, 

 337 : Reproductive organs, 337 



Maia, 524 



Malat'obdella, 274 



Malacostraca, 523*, 535, 547, 548, 551 



Malleus (of Rot if era), 307 



Malpighian tubes, 577 



Malpighian tubes, of Scorpion, 607 : of 

 Arachnida, 619 : of Tardigrada, 626 



Mandibles See Appendages 



Mantidi.v, 587 



Mantle, of Anodonta, 632 : Pelecypoda, 

 649: Amphineura, 664, 665: Triton, 

 675 : Gastropoda, (58!) : Scaphopoda, 

 705 : S< /,;<(, 711 : Xa nt if us, 729 



Manubrium, of Medusa, 125: of Olli, 

 119*, 120 



Marginal lappets, of Aun-lia, 156*, 157 



Marginal sense-organs, 125 



Marginal tentacles, of A urefia, 156*, 157, 

 159 



Marine Annelids, 403 



Mastax of Rotifera, 307, 308 



J[,i.j;,/,iin, ,I,K, 66, 67 



Mastigophora, 43* : Example, 63 : Clas- 

 sification, 65 : General organisation, 

 65, 66 : Systematic position of the 

 example, 65 



Maturation, 18*, 19 



Maxilla See Appendages 



Maxillary palp See Appendages 



Maxillipeds See Appendages 



May-flies, 585 



Medulla of Paramcecium, 79 



Medullary sheath, of Nerve-fibre, 27, 28 



Medusa-buds, of OMia, 119, 120 



Medusa?, of Obelia, 124, 125 



Megagametes, of Flagellata, 71 



Megaltesthetes, 668 



Megalopa stage, 553 



Megameres, of Ctenophora, 205 : of Poly- 

 clad, 257 



Meganucleus, of Ciliata, 84 : of Para- 

 irt'i-riiun, 79 



Megaspores, of Radiolaria, 61 



Megazooid, of Vorticella, 87, 89 



Meleni/t-iiut, 647, 661 



Mdeagrina mar gar it if era, 661 



Melicerta, 303, 305, 306 



Mtlolontha, 594 



Membranes, 22 



Menibranipora, 320 



Mentum, 573 



Meroblastic, 20* 



Mesenteric filaments, of Flabellum, 

 193 : of Sea-anemone, 175 

 VOL. I 



Mesenteries, of Sea-anemone, 174 

 Mesenteries, development of, in Sea- 

 anemones, 179, 180 : Arrangement in 

 Actinozoa, 185 

 Mesoblast, 21* 

 Mesoderm, 21*, 101, 1<2 

 Mesoderm bands, of 1'cfi^/ionfa, 581 

 Mesogkea, 101*, 102: of Obeliu, 121 

 Mesonephridia, 4.S1I 

 Mesopodium, 675, 688 

 Mesothorax, 574 

 Mesotrochal, 445 

 Mesozoa, 216 



Messmateism See Commensalism 

 Metagenesis, 39*: of Olw/ia, 129: Lepto- 

 limv, 141: Trachylinae, 144: Aun/in. 

 161 : Liver-Fluke, 230 : T(t?nia, 236 : 

 Platyhelmiiitlies, 259,266: Nematoda, 

 286 



Metameres, 41*, 403 



Metamorphosis, of Trachylinae, 144: Sea- 

 anemone, 180 : Platyhelminthes, 260 : 

 Nemertinea, 273 : PJioronis, 331 : As- 

 ferina, 361 : Antedon, 377 : Echino- 

 dermata, 396 : Chwtopoda, 445 : Apti*, 

 497 : Crustacea, 552 : Insecta, 600 

 Metamorphosis, retrogressive See De- 

 generation 

 Mttn mi n/,r,n*. 4!>7 

 Metapodium, 675, 688 

 Metathorax, 574 

 Metazoa, 96 

 Micrsesthetes, 668 

 Microgametes, of Flagellata, 71 

 Microgromia, 50 

 Microhydra, 137, 155 

 Micromeres, of Ctenophora, 205 

 Micromeres, of Polyclad, 257 

 Micronucleus, of Ciliata, 84 

 Micronucleus, of Paramcecium, 79 

 Micropyle, 113 



Micropyle, of Cephalopoda, 744 

 Microspores, of Radiolaria, 61 

 Microxtom urn, 263 

 Microzooid of VorticeUa, 87, 89 

 Miescher's corpuscles, 79 

 Mi! iota, 52 

 Millepora, 145 

 Millepora alcicorni*, 145 

 Millipedes, 567, 568 

 Hiiiya*, 189 

 Miocene, 7 

 Mites, 612, 616, 619 

 Mitome, 15 

 Mitosis, 16*, 17 

 Modiola, 649 

 Mollusca, 631, 751 

 Molluscoida, 313 

 Molluscoida, mutual relationships of the 



classes, 343 

 Monocystis ayiJis, 75 

 Monoecious, 37 



3 D 



