322 



ANIMAL LIFE 



Earthworm, alimentary canal of 

 (illus.), 71. 



Ectoblast, 82. 



Ectoderm, 33. 



Egg case of Calif ornian barn-door 

 skate (illus.), 140 ; cockroach (il- 

 lus.), 140. 



Egg cell, 21, 56. 



Egg, fertilized, 35; of bird (illus.), 

 79; of butterfly (illus.), 79; of 

 fish (illus.), 79; of katydid (il- 

 lus.), 79 ; of skate (illus.), 79 ; of 

 toad (illus.), 79. 



Electric ray. (illus.), 135. 



Embryology, 64. 



Embryonic development, 80 ; of 

 the pond snail, 81. 



Emmydrichthys vulcanus (illus.), 

 132. 



Endoblast, 82. 



Endoderm, 33. 



Environment, instincts of, 248. 



Epizoanthus paguriphilus, with 

 sea-anemone (illus.), 177. 



Erynnis manifoba, distribution of 

 (illus.), 273. 



Eucope (illus.), 42. 



Eudorina, 27. 



Eudorina elegans (illus.), 28. 



Exocwtus (illus.), 131. 



Eye of dragon-fly (illus.), 239 ; of 

 jelly-fish (illus.), 238. 



Fauna, 296; bassalian, 305 ; littoral, 

 306 ; pelagic, 304. 



Faunal areas of the sea, 304. 



Feeding habit of Californian wood- 

 pecker (illus.), 128, 129 ; of Mela- 

 nerpes formicivorns bairdii 

 (illus.), 128, 129; instincts of, 

 244. 



Female, 57. 



Fish, egg of (illus.), 79; embry- 

 onic stages of (illus.), 87 ; -louse 

 (illus.), 188. 



Fishes, man-of-war (illus.), 175 ; 

 nest-making habits of, 264. 



Fission, 9 ; binary, 54. 



Flagella, 25. 



Flagellata, 24. 



Flatworm, alimentary canal of 

 (illus.), 70. 



Flounder, development of (illus.), 

 100 ; wide-eyed (illus.), 100. 



Flying fishes (illus.), 131. 



Food, adaptations for securing, 

 125; necessary to animal life, 

 106. 



Form, primitive, 20. 



Fossil, 18. 



Fresh-water animals, barriers af- 

 fecting, 294. 



Function, 63. 



Fur seal (illus.), 136. 



Galapagos Islands, animals of 



(illus.), 278; locusts of (illus.), 



280. 

 Gall, giant, of white oak (illus.), 



143. 



Galls, insect, on leaf (illus.), 144. 

 Gapes, worm which causes, 60. 

 Gastrula, 82. 

 Gemmule, 35. 

 Generalization, 66. 

 Generation, spontaneous. 51. 

 Generations, alternation of, 51. 

 Geographical distribution, 272. 

 Geometrical larva on branch (illus.), 



209. 

 Gerrhonotus scincicauda (illus.), 



204. 



Giraffe (illus.), 126. 

 Gizzard, 71. 



