TABLE OF COXTEKTS. 



PAGE 



Introduction 7 



Favorable Conditions for Geologic Study 7 



Previous Geologic llesearch 7 



De la Beche 8 



The oflBcial British Survey 8 



Discrepancies of Conclusions 8 



Acknowledgments 14 



Pakt I. — Geography and Physiography 15 



Position and Relations 15 



Dimensions and Outline , . . 15 



Configuration , . . 16 



Mountainous Character of the Relief 16 



Primary and Secondary Features 16 



Relations of Plateau and Mountains 18 



The Mountains of the Interior 19 



The Blue Mountain Ranges 19 



Outlying Areas of Blue Mountain Structure 20 



The Clarendon Mountains 21 



Conclusions concerning the Blue Mountain Trends and former 



Extent 22 



The Plateau Region 23 



Extent and Altitude 23 



Material of the Substructure 24 



The Cockpit Country 25 



The Interior Basin Valleys 26 



St. Thomas-in-the-Vale 28 



Other Basin Valleys 28 



Topography of the Back Coast Borders 30 



Abruptness of the Sea Front 30 



Terraces and Benches 31 



The Jolm Crow Level 31 



The Medial Benches 32 



The Lower Benches ;-',2 



Benches of the Coast Plains 33 



Their Varied Composition 33 



The Elevated Reefs 35 



Coast Plains of the Liguanea Type 36 



The Drainage of Jamaica 38 



Drainage of the Blue Mountain Region 38 



Drainage of the Limestone Plateau 39 



Summary of the History recorded in the Configuration ... 40 



vol. XXXIV. 1 



