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 strvus Leidy, 342. 

 ^Ethalium, 503. 

 ^Etheria, 267. 

 Affections, 517. 



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

 Agamidae, 73. 

 Agassiz, A., 172, 175. 

 Agel&us phaniceus, 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, 34i. 354. 520. 

 Amblyrhiza, 352. 



Amblystoma tigrinuni, 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. 

 Anontia glabra, 265. 

 Anomodontia, 115. 

 Anthropomorpha, 132, 133, 143, 154, 



157. 158, 159, 305- 

 Antichemism, 484. ---~" 

 Antilocapra amerzcana, 55. 

 Ants, 462, 500. 

 Anura, 107, no, in, 113. 

 Aphrododiridae, 104. 



