INDEX. 



Abnormal articulations, 275. 

 Abortion of phalanges in ungulates, 



353- 

 Acanthodeans, 92. 

 Acanthopterygia, 102, 103, 104, 105, 



108, 

 Acceleration, 9, 201. 

 Acquired characters, 10, 359, 401, 4C2, 



458. 

 Acrania, 87, 94, 95, 193. 

 Acris, 71. 



Actinopterygia, 100, 172. 

 Actinozoa, 82, 83. 

 Adapidae, 155. 

 Adirondacks, 50. 

 /Elurodon savus Leidy, 342. 

 /Ethalium, 503. 

 jEtheria, 267. 

 Affections, 517. 



Africa, 73, 88, 115, 1G3, 168, 462. 

 Agamidae,73. 

 Agassiz, A., 172, 175. 

 Agelceus filler m'ct'US, 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 tigrinum, 58, 59, 200. 



Amblystomidae, 58, 199. 

 Ameghino, 154, 157, 357, 365. 

 America, 426. 



Ametabola, 203. 



Ammoccetes, 204. 



Ammonitinae, 187, 188, 189, 190. 



Ammonoids, 187, 1E8, 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, C02, 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. 



Annelidcs, 269. 



Anniellidae, 123. 



Anodonta, 261. 



Anomia, 170, 177. 



A710111 ia glabra, 265. 



Anoinodontia, 115. 



Anthropomorpha, 132, 133, 143, 154, 



157. 158, 159. 305- 

 Antichemism, 484. 

 Antilocapra americana, 55. 



Ants, 462, 500. 



Anura, 107, no, 111, 113. 



Aphrododiridae, 104. 



