3 6 4 



Index. 



Equilibrium sense of crayfish, 72. 



Of perch, 161. 

 Ermine, 282. 

 Esophageal collar, 70. 



Of grasshopper, 8, 9. 



Ring, 70. 

 Ewes, 271. 

 Excretion in amoeba, 291. 



In crayfish, 69. 



In earthworm, 95. 



In frog, 185. 



In grasshopper, 8. 



In paramecium, 293. 



In perch, 161. 



In pigeon, 216. 



In rabbit, 252. 



In snail, 130. 



In snake, 202. 

 Exumbrella, 321. 

 Eyed elater, 41. 

 Eyes of grasshopper, 8, 9. 



Of snail, 133. 



Of snake, 199. 



Of squid, 139. 



Facial angle, 282. 

 Falconidae, 233. 

 Fangs of snakes, 203, 204. 

 Feathers, development of, 208. 



Distribution of, 209. 



Kinds of, 209. 



Structure of, 208. 

 Feather stars, 331, 345, 347. 

 Feet of pigeon, 212. 

 Femur of grasshopper, 4. 

 Ferret, 282. 



Fertilization of sea urchin's egg, 342. 

 Filament, gastric, of jellyfish, 323. 



Mesenterial, 326. 

 Finches, 239. 

 Fins of fishes, 163. 



Of perch, 154. 

 Firefly, 42. 

 Fish, 154, 170. 



Brain, 285. 



Hatcheries, 166. 



Laws, 166. 

 Fish ways, 166. 

 Flagella, 297. 



Of hydroid, 320- 



Flagella of sponges, 307. 

 Flatfishes, 163, 175. 

 Flatworms, 348. 

 Flesh eaters, 278. 

 Flight of pigeon, 208. 

 Flippers of seals, 282. 

 Floating of fish, 155. 

 Flounder, 166, 175, 176. 

 Flukes of whale's tail, 265. 

 Flycatchers, 239. 

 Flying fish, 176. 



Foxes, 265. 



Muscles of pigeon, 211. 

 Food of clam, 113. 



Of crayfish, 64. 



Of earthworm, 92. 



Of frog, 181. 



Of perch, 156. 



Of pigeon, 214. 



Of rabbit, 247. 



Of sea urchin, 341. 



Of snake, 200. 



Of squid, 142. 



Of starfish, 335. 



Food balls of paramecium, 292, 293. 

 Food fishes, 165. 

 Food vacuole, 286, 287. 

 Foot of clam, 105, 106, 108. 



Of snail, 129. 

 " Form " of rabbit, 246. 

 Fossils, 285. 



Birds, 242. 



Bird tracks, 207. 



Brachiopods, 354. 



Crinoids, 345. 



Reptiles, 207. 

 Fox, 279. 

 Fresh-water clam, 102. 



Sponges, 310. 

 Frogs, 181, 192. 

 Function, 305. 

 Functions of animals, 304. 

 Fur of rabbit, 246. 



Gall, 51. 



Flies, 51. 



Gnat, 35. 



Gallinaceous birds, 230. 

 Gallinae, 230. 

 Game birds, 244. 



