INDEX AND GLOSSARY 



401 



Indus'ium (iinl/isinm, an under-garment), 

 354 



Inflores'cence (Jloresco, to begin to 



flower), an aggregation of cones or 



flowers, 373 



Infusoria (so called because of their fre- 

 quent occurrence in infusions), 107 

 Ingesta (ingero, to put into) and Egesta 



(effcro, to expel), balance of, 32 

 Ingestion (ingero, to put into), the taking 



in of solid food, n, 58 

 Insola'tion (insoto, to place in the sun), 



exposure to direct sunlight, 94 

 Integ'ument (integumentum, a covering) 



of megaspore : Gymnosperms, 375 : 



Angiosperms, 382 



Inter-cellular spaces, 347 

 Inter-muscular plexus (^-ACKW, to twine), 



288 



Internode (inter, between :_ nodus, a 



knot), the ^portion >of stem intervening 



between two nodes, 208 

 Intersti'tial (interstltium, a space be- 

 tween) cells, Hydra, 227 : growth, 



Spirogyra, 198 

 Intest'ine (intcstlnns, internal), part of 



the enteric canal of the higher animals, 



280 

 IntUS-SUSCep'tiOn (intus, into : snscipio, 



to take up), addition of new matter to 



the interior, 13 

 Iodine, test for starch, 27 

 Irritability (irritabllis, irritable), the 



property of responding to an external 



stimulus, 10 



Jaws : Crayfish, 315 : Dogfish, 324, 328 



Karyokines IS (/capvoi', a kernel or nu- 

 cleus : Kt't'Tjo-t?, a movement), indirect 

 nuclear division, 67 



Katab'olism ((cara/SoA.^, a laying down), 

 18. -See Metabolism, destructive. 



Kat'astates (KaracrT-qvai, to sink down), 

 1 8. See Mesostates, katabolic. 



Kidney : Crayfish, 318 : Dogfish, 330 



LAMINAR LA (lamina, a plate), 203 



(Figure), 204 



Labial palps, Mussel, 322 

 Larva, the free living young of an animal 



in which development is accompanied by 



a metamorphosis, 299 

 Larval Stages, significance of, Polygor- 



dius, 301 



Leaf, structure of: Nitella, 208, 209 

 213 : Moss, 335 : Fern, 344, 352 : limited 

 growth of, 214 



Leaflet, Nitella, 209 



Lept'othrix(Ae7T76s, slender ; 0pt', a hair), 

 filamentous condition of Bacillus, 89 : 

 Figure, 87 



LESSONIA (after Lesson, the French 

 naturalist), 204 (Figure) 



Leuc'ocyte (AeuKos, white : KVTOS, a hollow 

 vessel, cell), a colourlessblood corpuscle : 

 structure of, in various animals 

 (Figures), 57 : ingestion of solid par- 

 ticles by, 58 : fission of, 58 : formation 

 of plasmodia by, 58 



Leuwenhoek, Anthony van, discoverer 

 of Bacteria, 97 



Life, origin of. See Biogenesis. 



Life-history, meaning of the term, 43 



Lignin (lignntn, wood), composition and 

 properties of, 348 



Linear aggregate, an aggregate of cells 

 arranged in a single longitudinal series, 

 iSS 



Linnaeus, C., introducer of binomial no- 

 menclature, 8, 139 



Liver, Dogfish, 328 



M 



MACROCYSTIS Oua/cpos, long : 



bladder), 204 

 Mad'reporite (from its similarity to a 



madrepore or stone-coral), 311 



Mantle, Mussel, 320 



Manub'rium (inannbrium, a handle) of 

 Medusa, 241 



Matura'tion of ovum, 259 

 Maximum temperature of amoeboid 

 movements. 21 



Medulla or medullary substance (me- 

 dnlla, marrow): in Infusoria, no 



MedUS'a (Me'Soixra, name of one of the 

 Gorgons), the free-swimming reproduc- 

 tive zooid of a hydroid polype, 239-243 : 

 derivation of a, from hydranth (Figure), 

 241 



Medus'oid, a reproductive zooid having 

 the form of an imperfect Medusa, 

 Diphyes, 251 



Meg agam'ete (/ae'-ya?. large : -ya^e'to, to 

 marry), a female gamete 0/.7'.) distin- 

 guished by its greater size from the male 

 or microgamete, 132 



Meg'anucleus (/u.eya?) large: nucleus, a 

 kernel), in, 128 



Meg'asporan'gium (/u-eyas large : (T7ropa, 

 seed : ayyeiov, a vessel), the female 

 sporangium in plants with sexually di- 

 morphic sporangia, usually distinguished 

 by its greater size from the male or 

 micro-sporangium : Salvinia, 368 : Sela- 



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