INDEX AND GLOSSARY 



403 



.- 5 

 Multicellular, formed of many cells, 61, 



occurrence and general characters, 158 : 

 mycelium and aerial hyphse, 160-163 : 

 sporangia and spores, 160-162-165 ; transi- 

 tion from uni- to multi-cellular condi- 

 tion, 162 : development of spores, 163 ; 

 conjugation, 165 : death, 166 : nutrition, 

 167 ; parasitism, 167 : ferment-cells, 168 

 Mucous membrane 

 [ulti 

 162 

 Muscle (ww-r^/w-s-ja little mouse,a muscle), 



nature of. 130, 131 

 Muscle-fibres, Bougainvillea, 244 

 Muscle-plate, Polygordius, development 



of, 305 



Muscle-process, Hydra, 227, 232 

 Mushroom. See Agaricus. 

 MUSSEL (same root as muscle), Fresh- 

 water : Figure, 321 : general characters, 

 320 : mantle, shell, and foot, 320 : food- 

 current, 320 : enteric canal, 322 : gills 

 and blood-system, 323 : nephridia, gon- 

 ads, and nervous system, 323 

 Mycelial hyphse, the hyphae interwoven 



to form a mycelium. 



Mycel'ium (/IXVKTJS, a fungus), a more or 

 less felt-like mass formed of interwoven 

 hyphae : Mucor, 160 : Penicillium, 185 

 YCET'OZOA (MV'KTJS, a fungus : faov, 



MY MVKTJS, a ungus 



an animal) : Figure, 53 : occurrence 

 and general characters, 52 : nutrition, 



54 : reproduction and life-history, 54, 



55 : animals or plants? 181 

 My'ophan (/u.us, mouse, muscle : <f>aiVco. to 



appear), no 



Myxomyce'tes (nvt-a, mucus : nvxys, a 

 fungus). See Mycetozoa. 



N 



Norn atocyst (I^/IAO., a thread : KVOTIS, a 



bag), 229 



Nephrid'iopore (i/e$po?, a kidney : Tropos, 

 a passage), the external opening of a 

 nephridium, 285 



Nephrld'ium (i/e^pos, a kidney), structure 

 of, Polygordius, 285 (Figure) : develop- 

 ment of, 304 : Mussel, 323 : Dogfish, 

 33 



Neph'rostome (ve<f>po?, a kidney : 0-TOju.a, 

 a mouth), the internal or ccelomic aper- 

 ture of a nephridium, 285 

 Nerve, afferent and efferent, functions of, 



288 



Nerve-cell, 230, 245 



Nervous system, central and peripheral : 

 Medusa, 245 : Polygordius, 286 : func- 

 tions of, 288 : Starfish, 313 : Crayfish, 

 319 : Mussel, 323 : Dogfish, 330 

 Neur'OCOele (vevpov, a nerve: KOI'ATJ, a 

 hollow), the central cavity of the verte- 

 brate nervous system, 330 

 NITELL'A (niteo, to shine) : Figures, 



207, 212, 215, 217, 219 : occurrence and 

 general characters, 206 : microscopic 

 structure, 209 : terminal bud, 211 : struc- 

 ture and development of gonads, 209, 

 214: development, 219: alternation of 

 generations, 220 

 Node (nodus, a knot), the portion of a 



stem which gives rise to leaves, 208 

 Not'OChord (VWTOS, the back: xP^> a 



string), 328 

 Nucel'lus (diminutive of nucleus, the 



name formerly applied), 375, 382 

 Nuclear division, indirect : 64 (Figure) : 



65, 67 : direct, 67 

 Nuclear membrane, 62, 

 Nuclear protoplasm. See Achromatin. 

 Nuclear spindle, 65, 66 

 Nucle'olUS (diminutive of nucleus), 8 

 Nu'cleus (nucleus, a kernel), minute struc- 

 ture of, 63 ; Amoeba, 7, 8 : Paramcecium, 

 in, 114: Opalina, 121: Vorticella, 

 128 : Nitella, 210, 213 : fragmentation 

 of, 1 20 

 Nucleus, secondary, of megaspore, An- 



giosperms, 382 

 Nutrient solution, artificial, principles of 



construction of, 78, 



Nutrition : Amoeba (holozoic), n : Hse- 

 matococcus (holophytic), 28 : Hetero- 

 mita (saprophytic), 37 : Opalina (type of 

 internal parasite), 123 : Mucor 167 : 

 Penicillium, 190 : Polygordius (type of 

 higher animals), 273, 281 : Moss (type 

 of higher plants), 340 



Ocellus (ocellus, a little eye), structure 

 and functions of, Medusa, 241, 246 



CEsoph'agUS (oicro4>avos, the gullet). See 

 Gullet. 



Ontog'eny (O^TOS, being : yeyeerts, origin), 

 the development of the individual : 

 a recapitulation of phylogeny (y.v.), 

 146 



Oogen'esis (u>6v, an egg : yei/e'<ris, origin), 

 the development of an ovum from a 

 primitive sex-cell, 255, 258 



Oogon ium (J>oV, egg : yo^o?. produc- 

 tion), the name usually given to the 

 ovary of many of the lower plants. 



Oosperm (u>oV, egg : <77repju.a, seed), a 

 zygote (q.v). formed by the ovum and 

 sperm: a unicellular embryo, 173: 

 origin of nucleus of, 263 



Oosphere (wov, an egg : cr<cupa, a sphere), 

 a name frequently given to the ovum of 

 plants. 



Oospore (taov, an egg : criropa, a seed), a 

 name frequently applied to the oosperm 

 of plants. 



OPALIN'A (from its opalescent appear- 

 ance) : Figure, 122 : occurrence and 

 general characters, 121-123 structure 



fl 



i 



