494 



INDEX AND GLOSSARY 



pr 

 bi 



minate sex : Heteromita, 41 : Mucor, 

 156 : Spirogyra, 198 : Vaucheria 173 

 Gamob'ium (yd/uos, marriage : /Sips, life), 

 the sexual generation in organisms ex- 

 hibiting alternation of generations (q.v.) '. 

 rogressive subordination of, to agamo- 

 ium in vascular plants, 429, 440, 444, 



Ganglion (yayyAiov, a tumour), a swelling 

 on a nerve-cord in which nerve-cells are 

 accumulated, 341 



Gastric juice (yaa-rrjp, the stomach), pro- 

 perties Of, 12 



Gastric mill, 334 



Gastrolith (yaorijp, stomach : Ai'0o?, 



stone), 334 

 Gast'rula (diminutive of yaoTTjp, the 



stomach), the diploblastic stage of the 



animal embryo in %vhich there is a diges- 



tive cavity with an external opening : f 



characters and Figure of, 295 : contrasted ' 



with phyllula, 428 

 Gemma 'tion (gemma, a bud). See Bud- 



ding. 



Generation, asexual, See Agamobium. 

 Generation, sexual. See Gamobium. 

 Generations, Alternation of. See Al- 



ternation of generations. 

 Generative cell, 455 

 Generative nucleus, 474 

 Generalized, meaning of term, 140 

 Ge'nus (genus, a race), generic name, 



generic characters, 8, 139 

 Germ-filter, 99 

 Ger'minal spot, the nucleolus of the 



ovum. 257 

 Germina'tion (germinatio, a budding), 



the sprouting of a spore, zygote, or 



oosperm to form the adult plant : for 



germination of the various types see 



under their names. 

 Gill, an aquatic respiratory organ. 335, 357, 



383 

 Gland (glans, an acorn), an organ of 



secretion ($&) 1 gland-cells, 228, 



278 



Glochid'ium, larva of Mussel, 365 

 Gon'ad (761/05, offspring, seed), the essen- 



tial organ of sexual reproduction, 



whether of indeterminate or determinate 



sex, i.e. an organ producing either un- 



differentiated gametes, ova, or sperms ; 



see under the various types, and espe- 



cially 172, 198, 211, 290 

 Gon'odUCt (gonad and duco, to lead), a 



tube carrying the ova or sperms from the 



gonad to the exterior, 292 

 Grapping-lines, Diphyes, 249 

 Green gland See Kidney 

 Growing point : Nitella, 208 : Moss, 403 : 



Fern, 418: Gymnosperms, 452 

 Growth, 13 



Guard-cells of stomates, 421 



Gullet, the simple food-tube of Infusoria, 



47, no : or part of the enteric canal of 

 the higher animals, 277 



GYM'NOSPERMS(yu/a/6s, naked :<r7re'pjuia 

 seed) : Figures, 449, 453, 455, 456, 457 : 

 general characters, 447 : structure and 

 growth of stem, 448 : structure of cones 

 and sporophylls, 452 : reduction of gamo- 

 bium(prothalliand gonads), 460 : pollina- 

 tion and fertilization, 458 : formation of 

 seed and development of leafy plant, 459 



GynOBCium (yvv-q, a female : OIKOS, a 

 dwelling), the collective name for the 

 female sporophylls in the flower of 

 Angiosperms, 465, 471 



Haem'atochrome (al/ua, blood : 



colour), a red colouring matter allied to 

 chloroyhyll, 26 



HJ3MATOCOO CUS al/xa, blood : KOKKOS 

 a berry). Figure, 24: general characters, 

 23 : rate of progression, 23 : ciliary move- 

 ments, 25, 33 : colouring matters, 26 : 

 motile and stationary phrases, 28 : nutri- 

 tion, 28 : source of energy, 30 ; reproduc- 

 tion, 35 : dimorphism, 35 : animal or 

 plant? 1 80 



Haemoglobin (cu/ua, blood : globns, a 

 round body, from the circular red cor- 

 puscles of human blood), 58 : properties 

 and functions of, 280 



Head-kidney -. trochosphere, 297 



Heart : Crayfish, 337 : Mussel, 360 : 

 Dogfish, 384 



Heat, evolution of by oxidation of proto- 

 plasm, 17 



Heat-rigor (rigor, stiffness), heat-stiffen- 

 ing, 21 



Heliotropism, 168 



Hepato-pancreas (^Trap, liver : TrayKpe'a?, 

 sweetbread), 335 



Heredity (hereditas, heirship), 147 



Hermaph'rodite (epH.a</>p6StTos, from 

 Hermes and Aphrodite). See Monoecious. 



Heterogen'esis (eVepos, different : yeVeeris, 

 origin), meaning of term, 102 : supposed 

 cases of, 103 : not to be confounded with 

 metamorphosis or with evolution, 104 



HETEROMITA (erepos, different : niros, 

 a thread):- Figure, 38: occurrence and 

 general characters, 36 : movements, 37 : 

 nutrition, 37 : asexual reproduction, 40 : 

 conjugation, 41 : development and life- 

 history, 42, 43 : animal or plant? 181 



High and low organisms, 106 



Higher (triploblastic) animals, uniformity 

 in general structure of 304 



Higher (vascular) plants, uniformity in 

 general structure of, 431 



HistOl'Ogy (itrriov, a thing woven : Adyos, 

 a discussion), minute or microscopic 

 anatomy, 289 



