INDEX AND GLOSSARY 



397 



plants, properties of, 26 : occurrence in 

 Bacteria, 86 : in Hydra, 228 



Chrpm'atin (xpo>ju.<x, a colour), the con- 

 stituent of the nucleus which is deeply 

 stained by dyes, 7, 63 : male and female 

 in nucleus of oosperm, 259 



Chrom'atophore (xpi^a, colour : <f>epaj, 

 to bear), a mass of proteid material im- 

 pregnated with chlorophyll or some other 

 colouring matter, 26, 46, 195, 213, 228 



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

 25 : comparisons of with pseudopod, 34, 

 52 : absence of cilia in Arthropoda, 315 



Ciliary movement, 25 : a form of con- 

 tractility, 34 



Ciliate Infusoria, 105 



Classification, natural and artificial, 139 : 

 natural, a genealogical tree, 142 



Cnid'Ofolast (wiSy, a nettle : j8A.aoro'?, a 

 bud), the cell in which a nematocyst 

 (g.v.) is developed, 227 



Cnid'OCil (wiSr) and ciliiiui), the "trigger- 

 hair " of a cnidoblast, 227 



Ccelenterata, the, 304 



Ccelome (/coiAu>ju.a, a hollow), the body- 

 cavity : Polygordius, 269 : Starfish, 307 : 

 Crayfish, 314 : Mussel, 318 : Dogfish, 

 321 : development of, Polygordius, 298 



Ccelom'ate, provided with a coelome, 272 



Cffilomic epithelium. See Epithelium. 



Ccelomic fluid, Polygordius, 277 



Colloids (/co'AAa, glue : elSo?, form), pro- 

 perties of, 6 



Colony, Colonial organism, meaning of 

 term, 133, 241 : formation of temporary 

 colonies, Hydra, 230 



Columel'la (a little column), 160 



Com'missure (commissura, a band), 278 



Compound organism. See Colony. 



Concres'cence (cum, together : cresco, to 

 grow), the union of parts during growth 



Cone, an axis bearing sporophylls : Equi- 

 setum, 362 : Selaginella, 367 : Gymno- 

 sperms, 369 



Conjuga'tion (conjugfitio, a coupling), the 

 union of two cells in sexual reproduc- 

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

 Paramoscium, 112, 113: Vorticella, 130: 

 Mucor, 163 : Spirogyra, 196 : of ovum 

 and sperm, 259 : monoecious and dioe- 

 cious, 197 : comparison with plasmodium- 

 formation. 54 



Connective, ossophageal, 282 



Connective tissue, 308 



Contractile vac'uole (ziaciiiis, empty) : 

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

 moecium, 109 



Contractility (contracts, a drawing to- 

 gether), nature of, 10, 34 : muscular, 128 



Contraction, physical and biological, 10 



Corolla (corolla, a little wreath), the 

 inner or distal whorl of the perianth in 

 the flower of Angiosperms, 377 



Corpuscles. See Blood-corpuscles, and 

 Leucocytes. 



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

 constitution of, 59 : Infusoria, 108 



Cotton- wool as a germ-fitter, 97 



Cotyle'don (/cOTuATjSioV, a cup or socket), 

 the first leaf or leaves of the phyllula 

 (q.t>.) in vascular plants, 355 



Cranium (xpd.vi.ov, the skull), 324 



CRAYFISH : Figure, 312: general charac- 

 ters, 310, 311 : limited number and con- 

 crescence of metameres, 310 : appen- 

 dages, 310: exoskeleton, 311: enteric 

 canal, 311: gills, 314: blood-system, 

 314 kidney, 314 : nervous system, 315 



Creation (creo, to produce), definition of, 

 1 39 illustrated in connection with species 

 of Zoothamnium (Diagram), 140 



Cross-fertilization : applied to the sexual 

 process when the gametes spring from 

 different individuals, 197 



Cryst'alloids (Kpuo-raAAo?, crystal : elSos. 

 form), properties of, 6 



Cuticle (cuticula, the outer skin), nature 

 of in unicellular animals, 45, 107 : in 

 multicellular animals, 236 



Cyst ( KU'CTTIS, a bag), used for cell-wall in 

 many cases, n, 54 



D 



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

 apparent case of heterogenesis, 101 



Daughter-cells, cells formed by the fission 

 or gemmation of a mother-cell, 35, 65 



Death, phenomena attending, 20, 21, 164, 



165 



Decomposition, nature of, 6 



DermiS (6e'p/xa, skin), the deep or connec- 

 tive tissue layer of the skin, 308 



Descent, doctrine of. See Evolution. 



Development, meaning of the term, 43. 

 For development of the various types 

 see under their names. 



Dextrin, m 



Diastase, 80 



Diast'Ole (SiourreAAoj, to separate), the 

 phase of dilatation of a heart, contractile 

 vacuole, c. , 109 



DIATOMA'CE-S (5taTe>i/w, to cut across, 

 because of the division of the shell into 

 two valves), 153: Figure^, 154 



Diat'omin, the characteristic yellow colour- 

 ing matter of diatoms, 152 



DichOt'OmOUS (Sixoro/aeo), to cut in two), 

 applied to branching in which the stem 

 divides into two axes of equal value, 136 



Differentiation (diffiro, to carry different 

 ways), explained and illustrated, 34, 117 



Diges'tion (digero, to arrange or digest), 

 the process by which food is rendered fit 

 for absorption, 12, 13 : intra- and extra- 



