498 



INDEX AND GLOSSARY 



304, 309, 213, 3(4 ; occurrence and 

 general characters, 203 : microscopic 

 structure, 206 : terminal bud, 208 ; struc- 

 ture and development of gonads, 206, 

 211: development. 216: alternation of 

 generations, 217 



Node lnoiius, a knot), the portion of a 

 stem which gives rise to leaves, 205 



Not'ochord (fuTOK, the back : xopiii, a 

 string). :177 . . 



Nucellus (diniiniitive of nucltus, the 

 ii.Tine formerly applied), 456, 466 



Nuclear division. Indirect : 64 (Figure) : 

 direct, 67 



Nuclear membrane, 63 



Nuclear sap, 7, 63 



Nuclear spindle, 66 



Nude Olus (diiniiiuttve of nucleus), 81 63 



Nucleus (n/(i Iciis^ a kernel), minute struc- 

 ture of, 63 ; Amiclia, 7, 8 ; Parama;ciuni, 

 III, 114: Opalina, i2t : Vorticella, 

 T38 : Nilella, 208, 311 : fragmentation 

 of, 120 



Nucleus, secondary, of megaspore, An- 



giosfwrms. 474 



Nutrient solution, artificial, principles of 

 construction of, 77, 



Nutrition :—Anui:ba (hoio7oic), 11: Ha:- 

 matococcus (holophytic), 28 : Hetero- 

 mita (saprophytic), 37 : Opalina (type of 

 internal parasite), 123 : Mucor 167 : 

 Penicillium, igo : Polygordius (type of 

 higher animals), 370, 379 : Moss (type 

 of higher plants), 408 



Ooellns (Scellus, a little eye), structure 

 and functions of. Medusa, 240, 244 



(Esophagus (ot(ro<^ayof, the gullet). See 

 Cullet. 



Olfactory organ. Crayfish, 342 : Mussel, 



363: Dogfish, 394 

 Ommatideum (dim. of o/ifia, eye), 342 

 OntOg eny (6i^o?, being ; yeVtatt, origin), 

 the development of the individual : 

 a recapitulation of phylogeny (^.f.), 



Oogenesis (u>dc, an egg : yeV«rif , origin), 

 the development of an ovum from a 

 primitive sex-cell, 256 



Oo^On lum {i>6v, egg : yoi'Of, produc- 

 tion), the name usually given to the 

 ovary (^.r'.) of many of the lower plants. 



Oosperm (uoV, egg: iriripua, seed), a 

 zygote (y.7'.V formed by conjugation of 

 the ovum and sperm : a unicellular 

 embryo, 173, 260: origin of nucleus of, 

 261 



Gosphere (utd>>, an egg : mfxtlpa., a sphere), 

 a name frequently given to the ovum 

 (f.v.) of plants. 



Oospore (uov, an egg : <rwopd, a seed), a 



name frequently applied to the oosperm 

 (^.f.) of plants. 



OPALIN'A (from its opalescent appear- 

 ance) : — Figure, 12a : occurrence and 

 general characters, 121 : structure 

 and division of nuclei, 121 : parasitic 

 nutrition, 123 : reproduction, 124 : means 

 of dispersal, 124: development, 125 



Opt'imum (ofitimus, best) temperature for 

 am(t))oid movements, 21 : for sapro- 

 phytic monads, 40 



Organ (6pY<»'<»', an instrument), a portion 

 of the body set apart for the performance 

 of a particular function, 288 



Or'ganlsm, any living thing, whether 

 animal or plant, 5 



08phradium(o(r^pat>'0/iiat, to smell), 363 



Ossicle (iliniinulive of (Jj, a bone), 308 



Ovary (iK'Uiu, an egg), the female gonad 

 or ovuin-prodiicing orga.i ; see under the 

 various types and especially Vaucheria, 

 172 : atrophy of, in Aiigio.sperms, 474. 

 The name is also incorrectly applied to 

 the venter of the pistil of Angio.sperm.s, 

 465 



Or Iduot {drium, an egg : liiico, to lead), 

 a tube conveying the ova from the ovary 

 to the exterior, 292 



Ovum (&!ium, an egg), the female or 

 megagamete in its highest state of dif- 

 ferentiation : general structure of, 68 : 

 minute structure and maturation of, 256; 

 see also under the various types and 

 especially Vaucheria, 173: formation of, 

 in Angiosperms, 474 



Ov'ule (diminutive of ovum), the name 

 usually applied to the megasporangium 

 (>/.•'.) of Phanerogams. 



Oxidation of protoplasm, 15 



OXYTRIOHA (6fu9, sharp : Opif , a hair), 

 120 (Figure) 



Pallium See Mantle. 



Palp (/>ai/>o, to stroke). Crayfish, 325: 

 Mussel, -i55 



Pancreas (iravKpeas, sweetbread), 382 



PANDORINA (Figure), 262 



Param'ylum (n-apo, beside : a.)t.vkov. fine 

 meal, starch). 46 



PARAMCE'CIUM :- Figures, 108, 115: 

 structure, 107: mode of feeding, 112: 

 asexual reproduction, 114 : conjugation, 

 114 



Par'aslte, parasitism (irapacrirof, one 

 who lives at another's table) : — Bacteria, 

 92 : Opalina, 12-j : Mucor, 167 



Paren'cnyma ( Trapf'yxwfio., anything 

 poured in beside, a word originally used 

 to describe the substance of the lungs, 

 liver, and other soft internal organs), 

 applied to the cells of pl.nntsthe lengthof 



