422 



INDEX 



gcstionof, 144, 145; formation of, 52; 

 in lymphatics, 147; oxidation, 150; 

 storage of, 147; 'transformation of, 

 147 



Fatty acids, 40, 52, 145, 187; absorption 

 of, 147 



Featiier stars, classified, 272 



Feeble-mindedness, 259 



Feet, evolution of in camel series, 329; 

 evolution of in horse series, 324, 325; 

 webbed or lobate, an adaptation, 276 



Femur, 138, 139 



Feral, 329 



Fertilization, 180, 216; in beans, 186; 

 before and after egg laying, 195; in 

 earthworm, 185; external, 193, 194, 

 198; Hertwig's definition of, 187; 

 internal, 193, 194, 198; in metazoa, 

 180; methods of insuring, 189, 194; 

 nature of, 187; in ovary, 196; in 

 Protozoa, 180; relation to oviparity, 

 198; relation to ovoviviparity, 198; 

 relation to viviparity, 198; role of 

 sperm in, 187-188; self, 191; signi- 

 ficance of in Protozoa, 180; in 

 various animals, 190-194; in wheat, 

 186. 



Fertilization passage, 129 



Fertilized egg, 211 



Fibers, 36; in protoplasm, 37 



FibrilljB, 113; of muscles, 156, 157, 158 



Fibula, 138, 139 



Fibulare, 138 



Figs (see Blastophaga) 



Filar theory, 37 



Filibranchia, classified, 269 



Fins, an adaptation, 275 



First filial generation, 243 



First maturation division, in female, 212; 

 in male, 211 



First polar body, 213 



Fischer, lock and key hypothesis, 55; 

 synthesis of polypeptides, 52 



Fishes, 335; adaptations of, 275; age of, 

 315; classified, 273; congregation of, 

 192, 278; copulatory habits in, 192, 

 193; fertilization in, 192, 194; her- 

 maphroditism in, 190, 191; nests of, 

 198; parental care of, 201, 204 



Fission, 171, 179, 186; in Protozoa, 171; 

 transverse, 171 



Fittest, survival of, 8 



Fixity of species, 340 



Flagellata, 64; classified, 268 

 Flagellated epithelium, 110; columnar, 



109 

 Flagellum, 63, 64, 65, 177; structure of, 



155 

 Flame cell, 125, 126 

 Flask, Pasteur's, 167 

 Flatworms, 184, 186; classified, 272; 



nervous system of, 139 

 Fleas, parasites, 279 

 Flies, 166 



Floras, modern, age of, 315 

 Flounder, 107 



Flowing of protoplasm, 60, 61 

 Fluctuating variations, 344 

 Flukes, 184; classified, 272 

 Flycatcher, sperm of, 216 

 Flying squirrel, habitat of, 281. (See 



also Glaucomys.) 

 Foam, 36 

 Food, 53; of developing embryos, 195, 



196, 197; an environmental factor, 



305; utilization of stored, 147 

 Foot, of Hydra, 94 

 Foot, Katharine, 185 

 Foraminal aperture, 170 

 Foraminifera, classified, 268 

 Fore limbs, 137 

 Forest faunas, 281 

 Formaldehyde, 50 

 Formicidse (see Ants) 

 Formula, empirical, 40; structural, 39 

 Fossa, glenoid, 138 

 Fossil horses, 317 



Fossil records in taxonomy, 267, 268 

 Fossils, 4, 8, 234, 310, 311, 312, 314, 315, 



316; discovery of, 314; nature of, 310 

 Fourth glacial stage, 336 

 Fowls, birth stages in, 201 ; combs in, 362 

 Fox squirrel, migration of, 306; range of, 



292 

 France, ancient men of, 336 

 Free cell formation, 70 

 Freshwater animals, 283; adaptations of, 



276, 277 

 Freshwater eels, migration of, 300 

 Frog, 63; female urinogenital system of, 



130-131 ; figure of dissection of, 120; 



figure of nervous system, 141; male 



urinogenital system of, 131 

 Frogs, l)irth stages in, 203 ; classified, 274; 



egg carrying in, 200 

 Fruitfly, mutations in, 345 



