INDEX AND GLOSSARY 



397 



Cerebro-spinal cavity, Dogfish, 325 



CHARA (\apa, delight), development and 

 alternation of generations, 219, 220 



Chlor'ophyll (\Au>p6?, green : <}>v\\oi>, a 

 leaf), the green colouring matter of 

 plants, properties of, 26 : occurrence in 

 Bacteria, 87 : in Hydra, 231 



Chrpm'atin (xpw/xa, a colour), the con- 

 stituent of the nucleus which is deeply 

 stained by dyes, 7, 63 : male and female 

 in nucleus of oosperm, 263 



Chrom'atophore (xpw^a, colour : <e'pw, 

 to bear), a mass of proteid material im- 

 pregnated with chlorophyll or some other 

 colouring matter, 26, 46, 197, 215, 231 



Chromosome (^pio/na, colour : orco/ua, 

 body), 65, 66, 257, 262, 263 



Cil'ium (cilimn, an eye-lash), defined, 

 25 : comparisons of with pseudopod, 34, 

 52 : absence of cilia in Arthropoda, 319 



Ciliary movement, 25 : a form of con- 

 tractility, 34 



Cillate Infusoria, 107 



Classification, natural and artificial, 141 : 

 natural, a genealogical tree, 142 



Cnid Oblast (Kclfy a nettle : j3A<xcn-o's, a 

 bud), the cell in which a nematocyst 

 (q.v.) is developed, 230 



Cnid'OCil (wiSy and c ilium), the "trigger- 

 hair" of a cnidoblast, 230 



Coelenterata, the, 308 



Coelome (/cot'Aw/xa, a hollow), the body- 

 cavity : Polygordius, 273 : Starfish, 311: 

 Crayfish, 319 : Mussel, 322 : Dogfish, 

 325 : development of, Polygordius, 302 



CoBlom'ate, provided with a coelome, 276 



Ccelomic epithelium. See Epithelium. 



Coelomic fluid, Polygordius, 281 



Colloids (KoAAa, glue : el6o?, form), pro- 

 perties of, 6 



Colony, Colonial organism, meaning of 



term, 135, 247 : formation of temporary 



colonies, Hydra, 234 

 Columel'la (a little column), 162 

 Com'miSSUre (commissura, a band), 282 

 Compound organism. See Colony. 

 Concres'cence (cum, together : cresco, to 



grow), the union of parts during growth 

 Cone, an axis bearing sporophylls : Equi- 



setum, 366: Selaginella, 371 : Gymno- 



sperms. 373 



Conjuga'tion (conjug&tio, a coupling), the 



union of two cells, in sexual reproduc- 

 tion : Amoeba, 20 : Heteromita, 41, 42 : 

 Paramoecium, 114116: Vorticella, 132 : 

 Alucor, 165 : Spirogyra, 198 : of ovum 

 and sperm, 263 : monoecious and dioe- 

 cious, 199 : comparison with plasmodiiun- 

 formation, 54 



Connective, oasophageal, 286 



Connective tissue, 312 



Contractile vac'uole (vacuus, empty) : 

 Amoeba, 8, 9 : Euglena, 47 : Paramoe- 

 cium, in 



Contractility (contracts, a drawing to 

 gether), nature of, 10, 34 : muscular, 130 



Contraction, physical and biological, 10 



Corolla (corolla, a little wreath), the 

 inner or distal whorl of the perianth in 

 the flower of Angiosperms, 380 



Corpuscles. See Blood-corpuscles, and 

 Leucocytes 



Cortex, cor'tical layer (cortex, bark), 

 constitution of, 59 : Infusoria, no 



Cotton-WOOl as a germ-fitter, 99 



Cotyle'don (KoruArjSwv, a cup or socket), 

 the first leaf or leaves of the phyllula 

 (q.v.) in vascular plants, 359 



Cranium (/cpdi/iW, the skull), 328 



CRAYFISH : Figure, 316: general charac- 

 ters, 314, 315 : limited number and con- 

 crescence of metameres, 314 : append- 

 dages, 314 : exoskeleton, 311 : enteric 

 canal, 315 : gills, 318 : blood-system, 

 318 : kidney, 318 : nervous system, 319 



Creation (creo, to produce), definition of, 

 141 : illustrated in connection with species 

 of Zoothamnium (Diagram), 142 



Cross-fertilization : applied to the sexual 

 process when the gametes spring from 

 different individuals, 199 



Cryst'alloids (KpuoraAAos, crystal : etSos. 

 form), properties of, 6 



Cuticle (cnticnla, the outer skin), nature 

 of in unicellular animals, 45, 109 : in 

 multicellular animals, 239 



Cyst (KVCTTIS, a bag), used for cell-wall in 

 many cases, n, 54 



Dallinger, Dr. W. H., observations on an. 

 apparent case of heterogenesis, 103 



Daughter-cells, cells formed by the fission 

 or gemmation of a mother-cell, 35, 67 



Death, phenomena attending, 20, 21, 166. 

 167 



Decomposition, nature of, 6 



Dennis (Se'p/xa, skin), the deep or connec- 

 tive tissue layer of the skin, 312 



Descent, doctrine of. See Evolution. 



Development, meaning of the term, 43. ' 

 For development of the various types 

 see under their names 



Dextrin, 113 



Diastase, 81 



Diast'Ole (fitao-TeAAco, to separate), the 

 phase of dilatation of a heart, contractile 

 vacuole, &c., in 



DIATOMA'CE.33 (fiiare'javto, to cut across, 

 because of the division of the shell into 

 two valves), 155 : Figure, 156 



Diat'omin, the characteristic yellow colour- 

 ing matter of diatoms, 155 



Dichot'omous (SixoTo/aew, to cut in two), 

 applied to branching in which the stem 

 divides into two axes of equal value, 138 



