INDEX. 



Abnormal articulations, 275. 

 Abortion of phalanges in ungulates, 



353- 



Acanthodeans, 92. 

 Acanthopterygia, 102, 103, 104, 105, 



108, 



Acceleration, 9, 201. 

 Acquired characters, 10, 399, 401, 402, 



458. 



Acrania, 87, 94, 95, 193. 

 Acris, 71. 



Actinopterygia, 100, 172. 

 Actinozoa, 82, 83. 

 Adapidae, 155. 

 Adirondacks, 50. 

 sElurodon sezvus Leidy, 342. 

 ./Ethalium, 503. 

 ./Etheria, 267. 

 Affections, 517. 



Africa, 73, 88, 115, 163, 168, 462. 

 Agamidae, 73. 

 Agassiz, A., 172, 175. 

 Agelteus phezniceus, 52. 

 Ageniosus, 103. 

 Aglossa, 63. 

 Agnatha, 99, 195. 

 Alaska, 49, 50. 

 Algae, 75, 77. 



Allen, H. Dr., 47, 302, 334, 357. 

 Allen, J. A., 45. 

 Altruism, 517. 

 Amblypoda, 128, 132, 133, 141, 143, 144, 



297. 341, 354. 520. 

 Amblyrhiza, 352. 



Amblystoma tigrimnn, 58, 59, 200. 

 Amblystomidae, 58, 199. 

 Ameghino, 154, 157, 357, 365. 

 America, 426. 



Ametabola, 203. 

 Ammocoetes, 204. 

 Ammonitinae, 187, 188, 189, 190 

 Ammonoids, 187, 188, 422. 

 Ammonoidea, 421. 

 Amoeba, 76, 249. 

 Amcebodect mastication, 318. 

 Amphignathodontidae, 71. 

 Amphimixis, 459. 

 Amphioxus, 86, 457. 

 Amphisilidae, 104. 

 Amphiuma, 113, 218. 

 Anabolism, 481. 

 Anacanthini, 105, 106. 

 Anagenesis, 202, 475, 479, 516. 

 Anaplasis, 201. 

 Anaptomorphus, 155. 

 Anaptomorphidae, 154. 

 Anarcestes, 187. 

 Anchitherium, 148, 320, 359. 

 Ancistrodon contortrix, 22. 

 Ancyloceras, 189. 

 Ancylopoda, 128, 140, 143. 

 Anelytropidae, 123. 

 Anguidae, 123. 

 Annelides, 269. 

 Anniellidae, 123. 

 Anodonta, 261. 

 Anomia, 170, 177. 

 Anoinia glabra, 265. 

 Anomodontia, 115. 

 Anthropomorpha, 132, 133, 143, 154, 



157. 158, 159, 305- 

 Antichemism, 484. 

 Antilocapra americana, 55. 

 Ants, 462, 500. 

 Anura, 107, no, HI, 113. 

 Aphrododiridae, 104. 



