Index. 



363 



Digestive gland in starfish, 334. 

 Digestive system of clam, 115. 



Of crayfish, 65. 



Of earthworm, 89, 92. 



Of frog, 181, 183. 



Of grasshopper, 7. 



Of perch, 156. 



Of pigeon, 214. 



Of rabbit, 250. 



Of sea urchin, 340. 



Of snail, 129. 



Of snake, 200, 201. 



Of squid, 141. 



Of starfish, 334. 

 Digitigrade animals, 280. 

 Dingo, 259. 

 Diphycercal tail, 162. 

 Diplocardia, 95. 

 Dipnoi, 180. 

 Diptera, 32. 

 Discoid shell, 128. 

 Disk of starfish, 331. 



Of tapeworm, 349. 

 Distribution of crayfishes, 76. 



Of earthworms, 97. 



Of feathers, 209. 



Of fishes, 166. 



Of oysters, 123. 



Of protozoans, 300. 

 Diving birds, 224. 

 Division of amoeba, 289. 



Of labor, 302, 303. 

 Dogday harvest fly, 22. 

 Dogfish, 168, 169, 178. 

 Dogs, 279. 

 Doves, 233. 

 Down, 209. 

 Dragon fly, 13, 15. 

 Drones, 46. 

 Duckbill, 256. 

 Ducks, 228. 

 Dugong, 266. 

 Dung beetles, 40. 

 Duodenum of man, 283. 



Of pigeon, 215. 



Eagles, 233. 

 Ears of owls, 234. 

 Ear-shell, 136. 

 Earthworms, 87. 



Earthworms, distribution of, 97. 



Muscles of, 89. 

 Eating in amoeba, 290. 



In crayfish, 64. 



In paramecium, 293. 



In ruminants, 269. 



In starfish, 335. 

 Echinodermata, 331, 346. 

 Echinoidea, 338, 347. 

 Ectoderm of hydra, 313. 



Of sponge, 308. 



Of vorticella, 295. 

 Ectoplasm, 286. 

 Edentates, 259. 

 Eels, 176. 



Lamprey, 153. 



Round-mouthed, 153. 

 Efts, 192. 

 Eggs of birds, 218. 



Of crayfish, 73. 



Of earthworm, 97. 



Of fishes, 164. 



Of hydra, 317. 



Of jellyfish, 323. 



Of medusa, 321. 



Of snail, 134. 



Of snake, 202. 



Of sponges, 311. 



Shell, 219. 

 Egret, 229. 



Elasmobranchii, 168, 180. 

 Electric fishes, 164. 



Light bugs, 18. 



Ray, 170. 

 Elephant, 277. 



Elk, 273, 275 (Frontispiece). 

 Embryo of sponge, 311. 



Of tapeworm, 349. 

 Emu, 222. 



Enamel of rabbit's teeth, 248. 

 Encysted amoeba, 289. 

 Endoderm of hydra, 313. 



Of sponge, 308. 



Of vorticella, 295. 

 Endoplasm, 286. 

 Entomostraca, 83. 

 Epicranium of grasshopper, 4. 

 Epidermal plates of turtle, 205. 

 Epidermis of clam, 109. 

 Epiglottis of rabbit, 250. 



