498 



INDEX AND GLOSSARY 



204, 209, 212, 214 : occurrence and 

 general characters, 203 : microscopic 

 structure, 206 : terminal bud, 208 : struc- 

 ture and development of gonads, 206, 

 2it : development, 216: alternation of 

 generations, 217 



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

 stem which gives rise to leaves, 205 



Not'OChord (VUTOV, the back: xP 5> 7> a 

 string), 377 



Nucel'lUS (diminutive of nucleus, the 

 name formerly applied), 456, 466 



Nuclear division, indirect : 64 (Figure) : 

 direct, 67 



Nuclear membrane, 63 



Nuclear sap, 7, 63 



Nuclear spindle, 66 



Nucle'olUS (diminutive of nucleus), 8, 63 



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

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

 in, 114: Opalina, 121: Vorticella, 

 128 : Nitella, 208, 211 : fragmentation 

 of, 1 20 



Nucleus, secondary, of megaspore, An- 

 giosperms, 474 



Nutrient solution, artificial, principles of 

 construction of, 77, 



Nutrition '.Amoeba (holozoic), n : Hae- 

 matococcus (holophytic), 28 : Hetero- 

 mita (saprophytic), 37 : Opalina (type of 

 internal parasite), 123 : Mucor 167 : 

 Penidl'ium, 190 : Polygordius (type of 

 higher animals), 270, 279 : Moss (type 

 of higher plants), 408 



Ocellus (ocellus, a little ey), structure 

 and functions of, Medusa, 240, 244 



(Esoph'agUS (oi<ro<J>o-yos, the gullet). See 

 Gullet. 



Olfactory organ, Crayfish, 342 : Mussel, 

 363: Dogfish, 394 



Ommatideum (dim. of oft/ma, eye), 342 



OntOg'eny (OVTOS, being : yeVeo-is, origin), 

 the development of the individual : 

 a recapitulation of phylogeny (g.v.), 

 146 



Oogen'esiS (<&6v, an egg : -yeVeo-is, origin), 

 the development of an ovum from a 

 primitive sex-cell, 256 



Oogon'ium (woV, egg : yovo<>. produc- 

 tion), the name usually given to the 

 ovary (q.v.) of many of the lower plants. 



Oosperm (<I>oV, egg: <rire'p/aa, seed), a 

 zygote (q.v.), formed by conjugation of 

 the ovum and sperm : a unicellular 

 embryo, 173, 260 : origin of nucleus of, 

 261 



Oosphere (u>oV, an egg: ox/>cupa, a sphere), 

 a name frequently given to the ovum 

 (g.v.) of plants. 



Oospore (u>6v, an egg : <r7ropa, a seed), a 



name frequently applied to the oosperm 

 (g.v.) of plants. 



OPALIN'A (from its opalescent appear- 

 ance) : Figure, 122 : occurrence and 

 general characters, 121 : structure 

 and division of nuclei, 121 : parasitic 

 nutrition, 123 : reproduction, 124: means 

 of dispersal, 124: development, 125 



Optimum (oftimus, best) temperature for 

 amoeboid movements, 2r : for sapro- 

 phytic monads, 40 



Organ (op-yaw, an instrument), a portion 

 of the body set apart for the performance 

 of a particular function, 288 



Organism, any living thing, whether 

 animal or plant, 5 



Osphradium(6<r<paiVo/uai, to smell), 363 



Ossicle (diminutive of ds, a bone), 308 



Ov'ary (ovum, an egg), the female gonad 

 or ovum-producing orga.i ; see under the 

 various types and especially Vaucheria, 

 172 : atrophy of, in Angiosperms, 474. 

 The name is also incorrectly applied to 

 the venter of the pistil of Angiosperms, 



465 



Oviduct (ovum, an egg : duco, to lead), 

 a tube conveying the ova from the ovary 

 to the exterior, 292 



Ov'um (ovum, 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 

 (q.v.) of Phanerogams. 



Oxidation of protoplasm, 15 



OXYTRICH'A (ovs, sharp : flpt'f, a hair), 

 1 20 (Figure) 



Pallium See Mantle. 



Palp (palpo, to stroke), Crayfish, 325 : 

 Mussel, 355 



Pancreas (Tra-vKpeas, sweetbread), 382 



PANDORINA (Figure), 262 



Param'ylum (irapd, beside : a/mvAov. fine 

 meal, starch), 46 



PARAMCE'CIUM : Figures, 108, 115: 

 structure, 107 : mode of feeding, 112 : 

 asexual reproduction, 114 : conjugation, 

 114 



Par'asite, parasitism (Trapao-iros, one 

 who lives at another's table) : Bacteria, 

 92 : Opalina, 123: Mucor, 167 



Paren'chyma ( irapeyxv^a, 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 plants the length of 



