INDEX AND GLOSSARY 



497 



a millimetre, or i-25,oooth of an inch, 

 84 



Mloro-organism. See Bacteria. 



Micronucleus ( niKphi, small : nucleus, a 

 kernel), iii, 128 



Micropyle {y-iKpo^, small : ttvAj), an en- 

 trance), 457, 466 



Micro-sporan'gium (/iiKpbf , small : <ntopa., 

 a seed : ayyslovy a vessel), the male 

 sporangium in plants with sexually di- 

 morphic sporangia, usually distinguished 

 by its smaller size from the female or 

 mega-sporangium: — Salvinia, 440: Se- 

 laginella, 441 : Gymnosperms, 455 : An- 

 giospcrms, 466 



BAlc'rospore (^i<rpbf , small : artopi, a 

 seed), the male spore in plants with 

 sexually dimorphic spores, always dis- 

 tinguished by Its small size from the 

 female or mega-spore : — Salvinia, 440 : 

 Selaginella, 441 : Gymnosperms, 455 : 

 Aiigiosperms, 466 



Mlcrozo'oid (/micpos, small : ^uoc, an ani- 

 mal : (i£o9, form), the smaller zooid in 

 unicellular organisms with dimorphic 

 zooids, 35, 132 



Midrib of leaf. Moss, 403 



Minimum temperature for amceboid move- 

 nii:nts, 21 



MoUusca, the, 306 



MonOBC'iOUB (ii.6voi, single : oTko9, a 

 house), applied to organisms in which 

 the male and female organs occur in the 

 same individual, 199 



Monopodia! (ixovo^, single : Trovs, a foot), 

 applied to branching in which the main 

 axis continues to grow in a straight line 

 and sends off secondary axes to the 

 sides. 138 



MONOSTftOMA (/xoi/09, single : o-rpi/io, 

 aii\ iliiiiL,' spread out), 202 (Figure) 



Morphology (/Liop<<)^, form: Adyos a di.s- 

 cussion), the department of biology 

 which treats of form and structure, 9 



Mor'ula (diminutive of utdrum, a mul- 

 berry) See Polyplast. 



MOSSES : — Figures, 401, 406 : general 

 characters, 402 : structure of stem, 402 : 

 leaf, 403 : rhizoids, 403 : terminal bud, 

 403 : reproduction, 404 : development 

 of sporogonium, 405 : of leafy plant, 

 408 : alternation of generations, 340 : 

 nutrition, 408 



Mouth : — Euglena, 47 : Paramoecium, 109 : 

 Hydra, 220 : Medusa, 239 : Polygordius, 

 268 



MtJCOR {nnicor, mould) :— Figure, 159 : 

 occurrence and general characters, 158 : 

 mycelium and aerial hyphae, 160 : 

 .sporangia and spores, 160 ; transition 

 from uni- to multi-cellular condition, 

 162 : development of spores, i6i ; con- 

 jugation, 165 : death, 166 : nutrition, 167 : 

 parasitism, 167 : ferment-cells, 168 



Mucous membrane, 58 



Multicellular, formed of many cells, 61, 

 162 



Muscle {titusculiis^A little mouse, a muscle) 

 nature of. 130 



Muscle-flbres, Bougainvillea, 236 



Muscle-plate, Polygordius, 273 : develop- 

 ment of, 301 



Muscle-process, Hydra, 224, 232 



Muscular System, Crayfish, 327: Mu.s.sel, 



354 



Mushroom. See Agancus. 



MUSSEL (same root as muscle). Fresh- 

 water :— Figures, 351, 353, 356, 358, 

 361, 364 : general characters, 348 : 

 mantle, shell, and foot, 34B : food- 

 current, 359 : enteric canal, 355 : gills, 

 357 : blood-system, 360 : muscles, 354 : 

 nephridia, 359 : gonads, 363 : nervous 

 system, 362 



Mycelial hyphas, the hyphse interwoven 

 to form a mycelium. 



Mycelium (ji.vKr\<i, a fungus), a more or 

 less felt-like mass formed of interwoven 

 hypha; : — Mucor, 160: Penicillium, 185 



MYCET'OZOA (mvkis, a fungus : iiiov, 

 an animal) : — Figure, 53 : occurrence 

 and general characters, 52 : nutrition, 

 54 : reproduction and life-history, 54 : 

 animals or plants ? 181 



Myomere (/ivt, mouse, muscle : iiipoi, a 

 part), a muscle-segment, 327 



My'ophan (fiOf, mouse, muscle : i^aiVu, to 

 appear), no 



Myzomyce'tes (iivja, slime : iJ-vKr)(;, a 

 fungus). See Mycetozoa. 



N 



NaupliUS, embryo of Crayfish, 346 



Nem atocyst {viffia, a thread : KViTTii, a 

 bag), Figure, 226 



Nephrid'iopore (veijjpoi, a kidney : n-dpot, 

 a passage), the external opening of a 

 nephridium, 282 



Nephrid'ium (ve(i>p6<s, a kidney), structure 

 of, Polygordius, 281 (Figure) : develop- 

 ment of, 301 : Mussel, 359 : Dogfish, 



Neph'rOStome {ve<l>p6i, a kidney : (rrofia, 

 a mouth), the internal or coelomic aper- 

 ture of a nephridium, 282 



Nerve, afferent and efferent, functions of, 

 286 



Nerve-cell, 227, 242 



Nervous system, central and peripheral : 

 — Medusa, 243 : Polygordius. 283 : func- 

 tions of, 287 : Starfish, 315 : Crayfish, 

 241 : Mussel, 362 : Dogfish^ 391 



Neur'OCOBle {vtvpov, a nerve : KoiXrj, a 

 hollow), the central cavity of the verte- 

 brate nervous system. 391 



NITELL'A (ni/ea, to shine) :— Figures, 



