INDEX 



Aardvark, 323. 



Abnormalities, lobster, 119; plana- 



rians, 155 ; starfish, 196. 

 Acanthocottus, 236. 

 Acanthopteri, 252. 

 Acarina, 95. 

 Acartia, 128. 

 Accipiter, 298. 

 Acineta, 225. 

 Acipenser, 247. 

 Acmaea, 170. 

 Acmaeidae, 177. 

 Acrania, 252. 

 Acrididae, 1, 15. 

 Actitis, 306. 

 Adalia, 56. 

 Adeorbidae, 175. 

 Admiral, 21. 

 ^Eschna, 10. 

 Agalena, 90. 

 Agricultural ant, 37. 

 Alaudidae, 259, 317. 

 Alligator, 279. 

 Allolobophora, 114. 

 Alosa, 243. 



Amblystoma, 257, 335. 

 Amblystomidae, 257, 267. 

 Ameiurus, 240. 

 American crossbill, 284. 

 Amia, 248. 

 Ammonites, 173. 

 Amoeba, 227, 229. 

 Ampelidae, 291, 317. 

 Ampelis, 291. 

 Amphibia, 254; distribution of, 255; 



metamorphosis of, 260. 

 Amphioxus, 249, 252. 

 Amphipoda, 112. 

 Amphitrite, 149, 150, 159. 



Amphiuma, 198. 



Amphiumidae, 257, 266. 



Amphiura, 198. 



Anacanthini, 253. 



Anatis, 56. 



Ancestry of vertebrates, 248. 



Angle wings, 21. 



Anguidae, 271. 



Annelida, 136. 



Anodonta, 191 ; embryo of, 180 ; food 



of, 178 ; habitat of, 178. 

 Anolis, 268. 

 Auomiidae, 191. 

 Anthremis, 48. 

 Ant-eater, 322. 

 Antelopes, 326. 

 Authophagus, 47. 

 Ants, 30, 34, 43; army, 37; colonies 



of, 35 ; intelligence of, 35 ; language 



of, 36 ; leaf-cutting, 37 ; social life of, 



36. 



Anura, 255, 262, 266. 

 Apes, 230. 



Aphaniptera, 61, 70. 

 Aphids, 14. 

 Aphrodite, 148. 

 Aphroditidae, 159. 

 Apidae, 31, 42. 

 Aplysia, 164. 

 Apteryx, 307, 308. 

 Arachnoidea, 92. 

 Arbacia, 200. 

 Area, 184. 

 Archaeopteryx, 314. 

 Arched crabs, 123. 

 Archiaster, 195. 



Arcidae, 184. 

 Arctiidae, 24, 41. 

 Araneina, 80, 95. 

 Argiope, 80-83, 86; 

 397 



distribution of, 



