INDEX 



Page numbers referring to descriptions of fossils are printed in black face type. 



Acanthograptus, 67, 127, 130, 187, 191-94, 

 [96, 197, 199, facing p. 66. 



granti, 56, 130, 192, 196, 199. 



explanation of plates, 500, 502. 

 musciformis, 193. 



figure, 193. 

 pulcher, 56, 130. 

 suecicus, 192, 193, 225. 

 figures, 193. 

 walkeri, 52, 55. 127, 130, 194-96. 

 explanation of plates, 500, 502. 

 figures, 195. 

 Addison Junction, 38. 

 Alabama, 11, 19, 20, 21, 48, 296, 382, 383. 

 Albany, 37, 222, 236, 240, 295, 353, 387, 



398, 416, 436. 

 Albany county, 13, 18, 370. 

 Allman, cited, 213. 

 Ambleside, Scotland, 417. 

 Ami, H. M., cited, 17, 20, 21, 38, 42, 44, 

 46, 140, 141, 142, 143, 144, 219, 279, 280, 

 308, 328, 368, 387, 391, 398, 417, 437. 

 439, 446, 481. 

 Ammonite limestones, 65. 

 Ammonite shales, 65. 

 Ammonites, jj. 



Ampbigraptus, 67, 68, 107, 108, 128, 132, 

 260, 266, 270, facing p. 66. 

 distans, 270. 



divergens, 14, 27, 49, 128, 132, 270, 271- 

 72, 274. 

 explanation of plate, 518. 

 figures, 272. 

 multifasciatus, 14, 49, 108, 128, 132, 

 272-74. 

 explanation of plate, 518. 



Ampyx (Lonchodomas) hastatus, 430. 



Amsterdam, 241, 353, 417. 



Anjou, Franco, 423. 



Anticosti, Island of, 42. 



Appleton, Wis., 150. 



Arbuckle mountains, I. T., 294, 354. 



Archiac, d', 423. 



Arenig, 273. 



Arey, A. L., mentioned, 164. 



Arkansas, 22, 41, 48, 60, 234, 239, 250, 

 265, 280, 298, 320, 328, 329, 334, 351, 

 368, 382, 416, 440, 441, 443, 446, 481. 



Arkansas shales, 2^. 



Aroostook, Me., 422. 



Asaphus gigas-iowensis, 399. 



Ashhill beds, 64, facing p. 9. 



Augusta county, Va., 19, 256, 359. 



Australia, 26, 48, 60, 280, 298. 



Axonolipa, 9, 61, 67, 68, 96, 114, 118, 119, 

 128, 132, 247, 276, 401, 403. 



Axonophora, 9, 61, 67, 68, 94, 102, 103, 

 122, 129, 233, 339; extension of virgula 

 into the nemacaulus in, 96-97 ; phylo- 

 genetic relations of the genera, 118-- 

 26. 



Azygograptus, 67, 128, 132, 233, 256-57, 

 facing p. 66. 

 ? simplex, 13, 16, 18, 48, 128, 132,258-60, 

 485. 

 explanation of plate, 517. 

 figures, 259. 

 walcotti, 13, 48, 128, 132, 257-58. 

 figure, 257. 



Bailey, L. W., cited, 54, 143. 

 Bainbridge limestone, 55, 57, 460. 



559 



