INDEX AND GLOSSARY 



397 



Cerebro-spinal cavity, Dogfish, 325 



CHARA (\apd, delight), development and 

 alternation of generations, 219, 220 



Chlor'ophyll (\Acop6?, green : ijkvAAoi', a 

 leaf), the green colouring matter of 

 plants, properties of, 26 : occurrence in 

 Bacteria, 87 : in Hydra, 231 



Chroin'atin (xpcu/ua, 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/aa, colour : $e'pu>, 



to bear), a mass of proteid material im- 

 pregnated with chlorophyll or some other 

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



Chromosome (xp<I>/u.a, colour : au>/u.a, 

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



Cilium (f ilium ) 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 (KinSy, a nettle : /SAao-ro's, a 

 bud), the cell in which a nematocyst 

 (q.v. ) is developed, 230 



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

 hair" of a cnidoblast, 230 



Coelenterata, the, 308 



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

 cavity : Polygordius, 273 : Starfish, 311 : 

 Crayfish, 319 : Mussel, 322 : Dogfish, 

 325 : development of, Polygordius, 302 

 Coelom'ate, provided with a coelome, 276 

 Ccelomic epithelium. See Epithelium. 

 Coelomic fluid, Polygordius, 2 81 

 Colloids (/foAAa, glue : etSos, form), pro- 

 perties of, 6 



Colony, Colonial organism, meaning of 



term, 135. 247 : formation of temporary 

 colonies, Hydra, 234 

 Columella (a little column), 162 

 Com'miSSUre (cotninissftra, 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 (conjugdtio, a coupling), the 

 union of two cells, in sexual reproduc- 

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

 Paramcecium, 114 116: Vorticella, 132 : 

 Mucor, 165 : Spirogyra, 198 : of ovum 

 and sperm, 263 : monoecious and dioe- 

 cious, 199 : comparison with plasmodium- 

 formation, 54 



Connective, oasophageal, 286 



Connective tissue, 312 



Contractile vac'uole (vacfuis, empty) : 



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



cium, in 



Contractility (cont radio, 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 (KOTvArjScGc, a cup or socket), 

 the first leaf or leaves of the phyllula 

 (q.i'.) in vascular plants, 359 



Cranium (Kpd.vf.oi/, 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 (/cpvcrraAAos, crystal : el5o?. 

 form), properties of, 6 



Cuticle (cuticula, the outer skin), nature 

 of in unicellular animals. 45, 109 : in 

 multicellular animals, 239 



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

 many cases, ir, 54 



D 



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 



DermiS (Sep/aa, 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 (Stao-reAAio, to separate), the 

 phase of dilatation of a heart, contractile 

 vacuole, &c., in 



DIATOMA'CE^! (6iaTe>i/o>, to cut across, 

 because of the division of the shell into 

 two valves), 155 : Figure, 156 



Diat'oniin, the characteristic yellow colour- 

 ing matter of diatoms, 155 



DiChot'omous (Stxoro^eto, to cut in two), 

 applied to branching in which th ; stem 

 divides into two axes of equal value, 138 



