INDEX 



4 



Pjtige pumbers referring to descriptions of fossils are printed in black 

 facejtyptp- The superior figures tell the exact place on the page in ninths; 

 e. g.^623 3 ! means page 623, beginning in the third ninth of the page, i. e. 

 about ontft third of the way down. 



Actixrtopttjpria, 655 5 . 



Additions] to paleontologic collec- 

 tion^, 4(j?l 2 -68 6 . 



AdiroiWaciks, maximum of com- 

 pression east of, 643 B . 



Aeglink 640*, 641 2 . 



Agelac|rinit|es buttsi, 527 6 , 528 6 . 



AgnostUs, ©40*, 641 2 . 



Agoniaiitesi expansus, 668 4 , 668 7 . 



Agoniawiteslj limestone, 436 2 ; fauna, 



668 7 . 1 | 

 Albion cuuacirangle, contact lines of 



Upper'! SiluiVic, 519 7 -21 2 . 

 Ambocoetylia umbonata, 623 3 , 624*. 



var. ogregaria, 622 s . 

 American^ association for the ad- 



vancen ienti of science, memorial 



tablet r for l the Emmons house, 



452 2 -56 3 . 

 American' ", paleozoic fossils, record 



of locaiqtiesS 468 c -516. 

 Ami, cited' i 558 3 , 559 2 , 507% 576 2 , 576*, 



579 7 , 643T- 

 Amnigenia catskillensis, 671*. 

 Ampyx, 64? 4 , 641 2 . 

 Annelids, f^44 6 . 

 Appalachian n geology, eSS 1 ^ 9 . 

 Appalachia^ n Mediterranean, 649*. 



Appalachia.b valley barrier, 638 3 , 



661 2 . A 



Appalachian i valley trough, 638°. 

 Arey, Albei,|t L., cited, 432 2 . 

 Arthracantlla depressa, 624 s . 

 Association t of American geologists, 



organization, 452 8 . 

 Athens trough, 644 5 . 

 Athyris ang.Jelica, 526 e , 527 6 . 

 cora. 526)k 527\ 

 polita. 52tf7 7 . 



Atrypa, 623 3 . 



aspera, 628 8 . 



hystrix, 624 5 . 



reticularis, 622 s . 

 Aviculopeeten, 526 5 . 

 Axonophora, 571 T . 



Bactrites, 655 6 . 



Barrois, cited, 563 7 . 



Bays sandstone, 645 5 . 



Beekmantown dolomite, exposures, 

 534 9 , 536 4 , 537 2 , 537 7 . 



Beekmantown formation, 637* ; 

 study of fauna, 427 4 ; in Rensse- 

 laer county, graptolite (Levis) 

 facies, by Rudolf Ruedemann, 

 546-75. 



Beekmantown time, 660 9 . 



Bell, Robert, mentioned, 434 3 . 



Bellerophon ma era, 526 s . 



Beloceras, 656% 



Bertrand, cited, 649 3 . 



Billings, E., referred to, 633 9 . 



Black river invasion, 641 5 . 



Bothriolepis, 528 3 , 528 9 . 



Brachiopods, 430 9 , 527 3 , 533*, 539 9 , 

 544°, 554 s , 556 s , 566*. 



Brockport quadrangle, contact lines 

 of upper Siluric formations, 517 1 - 

 23. 



Brogger, cited, 563*. 



Bronn, cited, 599*. 



Bryograptus, 550 s , 555 8 , 584 3 , 586% 

 588 5 , 589^. 

 sp. nov. 554*, 555 9 , 566 1 . 

 kjerulfi, 556 1 . 



Buthotrephis gracilis, 597". 

 subnodosa, 597°. 



Butts, Charles, referred to, 441 s , 

 442 8 ; paleontologic work, 446 9 , 

 524 3 . 



