Index 



491 



Dermal bones, see Stegocephala 

 Desert Botanical Laboratory, 76 

 location, 75 



work, 76-81, 220, 222, 245, 297 

 ill. 75 



Desmids, shells, 94 



Destruction, see Capelan; Cepha- 



lopods; Fish, death; Gar 



pike; Jack rabbit; Octopus; 



Eodents; Tile fish; Wolves 



Determiners of characters, 202 et 



seq., 478 



Development, determinate, 190-2 

 indeterminate, 192 

 see Chromosomes 

 Devils Lake, N. D., 380 



disappearance of pickerel, 119 

 Devonian period, Amphibia, 112 



lungfish, 120 



DeVries, 203, 240-1, 243, 478 

 Diabetes, see Pancreas 

 Diatom ooze, 353 

 Diaptomus, light response, 316 

 Diatoms, shells, 94, 360 

 Dialysis, 295 

 Diastase, 279 

 Dicksissel, spread, 182 

 Didinium, 93 

 Diet, experiments 

 athletes, 289 

 dogs, 289-92; ill. 291 

 hens, 294 



soldiers, 287-8 ; ill. 288 

 requirements, 287 et seq. 

 Digestion, 295-6, 299, 321 

 Dinornis, see Moa 

 Dinosaurs, 40 



distribution, 125-6 

 extinction, 127 

 food, 127 

 intelligence, 127 

 structure, 126 

 tracks, 125-6 

 ill. 126 

 see Mammals 



Diplococcus, see Meningitis 

 Diphtheria, 448-9; see Serum, Tox- 

 in 



Disease, see Bright 's, Chestnut, 

 Foot and Mouth, Venereal 

 Dispersal, see Animals, Plants 

 Distribution, animals and plants, 



factors, 177 



horizontal, see Animals, aquatic; 

 Cassowary ; Emu ; Moa ; 

 Ostrich ; Khea 

 Ditch-grass, 382 

 Ditmars, 63 



Diurnal movement, see Animals, 



aquatic 



Dog, see Diet, Hairless 

 Dogfish, see Sharks 

 Dominance, 258; imperfect, 258- 



261 



Doty, 454 

 Douglas spruce; distribution, 174, 



175 



Dredge, 369-70 

 Drelincourt, 208 



Drosera, reactions, 308-9; ill. 309 

 Drosophila, 210 et seq., ill. 209, 



212; see Inheritance 

 Drummond, 37 

 Duck, see Wood 

 Ductless glands, function, 481 

 Dust, organic, volcanic, 353 

 Dwarfism, 273 



Ear bones, relation to gills, see 

 Vertebrates, structure 



Earth, age, 116-7 



Earthworms, see Annelids 



Eating, healthful, 293-4 



Echinoderm, development experi- 

 ments, 192 



Echinoderms, larvae, 105; sex deter- 

 mination, 209 



Eckman, 365, 368 



Edwards, inheritance, 270, 273 



Eels, migration, spawning, 361, 

 363 



Eggs, fish, distribution, 426, 429 

 membrane formation, 328-9 

 union with sperm, 327 

 see Crustacea, Estheria, Organ- 

 forming, Eeproduction, Ko- 

 tifers, Summer, Winter, 

 Worms 



Egret, preservation, 421-3; ill. 421 



Ehrlich, 446 



Eigenmann, 88, 381 



Eimer, 243 



Elephant, 146; see Imperial 



Elk, 425; distribution, 174 

 preservation, 420 

 ill. 420 



Elodea, see Water -weed 



Embryos, 104; see Vertebrate 



Empedocles, 235 



Emu, distribution, 139 



Enamel, see Teeth, Mammalian, 

 Placoid scale 



Endosperm, 245 



