ATLANTIC CONNECTIONS 627 



Page Plate 



Atlantic connections of Appalachian seas, Faunal realm of 483 



Invasions of (diagram) 347 



Occasionally superseded without break by Gulf of Mexico 



invasions of 569 



Atrypa reticularis 299 



Attalla conglomerate 438 27 



Aviculopecten amplus 594 



Axeman limestone 552, 653, 657, 660, 674 27 



Axes, Transverse 562 



Bailey limestone . . 28 



Bain and Ulrich, on Ozarkian formations 629 



Bainbridge limestone . . 28 



Bald Eagle sandstone 27 



Baltic Ordovician faunas 494 



section inadequate for a standard 609 



trough 485', 487 



Bangor limestone . . 29 



Barrier efficiency of Harrisburg axis 563 



Barriers 562 



prohibiting intermingling of distinct faunas 512 



Baseleveling, Paleozoic continent 



Basins, Permanence of oceanic 



Bossardville limestone 



Bass Island 



Bassler, R. S., Russian Ordovician Bryozea 



Batesville sandstone 



Bathyurus amplimarginatus 657, 664, 666 



caudatus 653, 661 



cf. conicus 653, 670 



cf. nero 670 



"Bays" sandstone 521, 544 27 



Beatricea 326 



gracilis 327, 557 



Beaver limestone 618 27 



Becraf t formation 28 



Bedford shale 527 29 



Beech River . . 28 



Beekmantown ' 563, 649 27 



between Carlisle and Allentown 655 



divisions 650 



fauna in Newfoundland. 652 



in Maryland and Pennsylvania 652 



limestone 553, 650 



limestone formations 443 



Restriction of term 651 



Beekmantown- Stones River hiatus 553 



304 





394 







28 





28 



488 





475 



29 



