XVI CONTENTS. 



The sedimentary formations of the Panama Canal Zone — Continued. 



Descriptions of local sections across the Isthmus of Panama — Continued. Page. 



Section, north end of Miraflores Locks 534 



Section, Pedro Miguel Locks to Paraiso Bridge 534 



Section at Bald Hill near Miraflores Locks. 534 



Section along east side of Gaillard Cut from Canal Commission stations 



1843 to 1850 535 



Section on west side of Gaillard Cut from Canal Commission stations 



1775 to 1756 535 



Section on west side of Canal Commission station 1720, near Empire, to 



1740, near Culebra 536 



Section on west side of Gaillard Cut near Las Cascadas, Canal Commis- 

 sion stations 1617 to 1597 537 



Sections in cuttings of Panama E-ailroad near Caimito Junction 539 



Railroad cut near stream about midway between Rio Frijol and Rio 



Frijolito 539 



Section in railway cuts near New Frijoles 540 



Section showing chief railway cuttings and outcrops along the Panama 



Railroad between Bohio and Monte Lirio 540 



Exposure a quarter of a mile northwest of old Bohio railroad station . . 541 

 Exposure opposite old Bohio railroad station, north side of the railroad 



track 541 



Section at Pena Blanca, about one mile below Bohio, on the west side 



of Chagres River 541 



Section at Vamos a Vamos, 2-| miles below Bohio, west side of Chagres 



River 542 



Section on Panama Railroad from Monte Lirio to outcrop of Gatun 



formation on south side of Big Swamp 542 



Section showing Gatun formation, one-quarter to one-half mile from 



Camp Cotton, toward Monte Lirio, at big curve on railroad 542 



Large railway cutting a quarter of a mile from Camp Cotton, toward 



Monte Lirio . 543 



In the next two exposures going toward Camp Cotton 543 



Section in cut one-half mile west of Camp Cotton toward Gatun 543 



Generalized sections of the bluffs .exposed along the Panama Railroad, 



relocated line, about 3,500 feet south of Gatun railroad station 543 



Section from top of hill at western end of Gatun dam to bottom of the 



spillway 543 



Section at west end of the spillway 543 



Exposures in the vicinity of Mindi Hill 544 



Monkey Hill, Mount Hope station 544 



Section of bluff at end of Toro Point 544 



Section one- third mile south of southern end of Toro Point Breakwater, 



in quarry 545 



The biologic character and geologic correlation of the sedimentary 

 formations of Panama in their relation to the geologic history of 



Central America and the West Indies. By Thomas Wayland Vaughan . . 547 



Introduction 547 



Biologic character of the sedimentary formations in Panama 547 



Eocene 547 



Oligocene 549 



Bohio conglomerate 549 



Limestone on Haut Chagres 549 



Limestone at David 549 



Large Foraminifera from David 549 



