INDEX 



(Principal references are given in boldface) 



Abel, O., 86, 115, 141, 165. 

 absarokae, Didelphodus, 110. 

 Absarokee, Mont., 27. 

 Absarokius, 144, 145, 168. 

 aceroides, Platanus, 19. 

 Aemeodon, 106-111. 

 acmeodontoides, Emperodon, 109. 

 acolvtus, EUipsodon, 53, 225, 227, 233, 

 234, 239. 



Mioclaenus, 225. 

 acutus, Viverravus, 208, 209. 

 Adam, Lake, Mont., 13, 23, 37. 

 Adapinae, 148. 

 Adapis, 148. 



admirabilis, Ptilodus, 84, 85. 

 affinis, Sapindus, 19. 

 agapetillus, Anisonchus, 225. 



Oxyacodon, 225, 227. 

 Alder, 58. 



Allognathosuchiis, 59. 

 Almagre formation, 196. 

 alticuspis, Palaechthon, 33, 47, 62, 156 



seq., 159. 

 Amblydactvla, 265, 268. 

 Amblypoda, 217, 218, 265-268. 

 amblyrhyncha, Populus, 57. 

 American Fork, Mont., 13. 

 American Fork formation, 14. 

 americanus, Eucosmodon, 83, 104. 

 americanus primus, Eucosmodon, 83, 



103, 104. 

 Ampelopsis, 57, 58. 

 Anacodon, 180, 195. 

 Anaptomorphidae, 33, 60, 61, 142 seq. 

 Anaptomorphus, 144. 

 anceps, Plesiadapis, 35, 47, 50, 51, 156, 



168, 169. 

 angustidens, Mimotricentes, 34, 36, 37, 



47-49, 52, 194, 197, 205 seq. 

 Anisonchinae, 124, 217, 223, 224, 255 



seq. 

 Anisonchus, 2, 50, 62, 216, 256, 258, 

 262 seq., 267. 



agapetillus, 225. 



gillianus, 258, 259. 



mandibularis, 282. 



sectorius, 34, 37-41, 48, 50, 51, 53, 

 54,255,259,261,262 seq. 

 Apatemyidae, 147. 

 Apatemys, 144. 

 Apheliscidae, 124. 

 Apheliscus, 124. 

 Aphronorus, 106, 121, 124 seq. 



fraudator, 33, 38, 47, 53, 62, 124 

 seq., 140. 

 apiculatus, Oxyacodon, 225-227. 



119212—37- 



-19 



aquilonius, EUipsodon, 34, 37, 39, 47, 62, 



66, 227, 233, 234 seq., 238, 240. 

 arachioides, Leguminosites, 57. 

 Aralia notata, 57. 

 Arbor-vitae, 58. 

 Arctocyon, 171, 180. 



primaevus, 7. 

 Arctocyonidae, 34, 60, 61, 170, 171 seq., 



207. 

 Arctocyonides, 172. 

 Arctocyoninae, 170-172, 173 seq. 

 Arctoryctes, 139, 140. 

 Artiodactyls, 220, 225, 229-231. 

 asaphes, tJnuchiuia, 35, 47, 68. 

 Aspideretes nassau, 59. 

 australis, Thryptacodon, 42, 48, 68. 

 Baldwin, D., 7, 233, 262. 

 Barylambda, 11, 222, 269. 

 Barylambdinae, 269. 

 bathmodon, Pantolambda, 269-27L 

 Bathvopsidae, 266, 267. 

 Bats," 136. 

 Bear Butte, Mont., 13, 16, 22, 23, 24, 28; 



31, 38. 

 Bear Creek, Mont., 11, 170. 

 Bear formation. 15, 17 seq., 21, 26-28, 



55, 57. 

 Bearpaw formation, 15, 16. 

 Bears, 180, 182. 

 Beech, 58. 



belgicus, "Omomys", 144. 

 Belt uplift, Mont., 14. 

 Bessoecetor, 51, 52, 106, 121, 122 seq. 

 diluculi, 33, 47, 122 seq. 

 thomsoni, 35, 47, 50, 122, 123. 

 Big Elk sandstone, 15. 

 Bighorn Basin, Wj^o., 55, 83. 

 Bighorn Mountains, Wyo., 11. 

 Big Snowv Uplift, Mont., 14. 

 Bigtimber, Mont., 12. 

 Bigtimber Creek, Mont., 13. 

 Billings County, N. Dak., 11. 

 Birch, 58. 

 Bittersweet, 58. 

 Blainville, H. M. de, 7. 

 Bolodon, 70. 

 Bridger formation, 143. 

 Broom, R., 71, 72, 86, 89-92. 

 Brown, B., 11, 14. 

 Buford, N. Dak., 7, 11. 

 Bull Mountain Field, Mont., 26, 58. 

 Burke, J. J., 6. 

 Cabrera, A., 64, 246. 

 Cabrera's Law, 64 seq. 

 Caenolestes, 115. 

 Caenolestidae, 136. 

 Caenopithecus, 161. 



279 



