152 BULLETIN: MUSEUM ОҒ COMPARATIVE ZOOLOGY. 
Тһе Chagres Valley . 
Тһе Barbacoas Formation. 
Report by H. W. Turner on the Barbacoas Formation, of Barba- 
coas, Tavernilla, and San Pablo . 
The Mata Chin Subsection . . eL Т 
Mata Chin Formation (“ Nigger He ad” Bluffs) . 
The Marine Igneous Rocks Жык Ха?» 
The Red С1ауз. e i 
Topographic Bench at Mata Chin ; 
The Culebra Subsection . sir Ee 
The Culebra Basin 
The Culebra Clays 
The Culebra Mountain . 
Section of the Culebra Mountain 
The Empire Limestone . ; 
The Pacific Subsection 
The Igneous Rocks 
'The Miraflores Beds . 
The Panama Swamps 
Cerro Ancon 
'The Panama Formation. 
Its Relation to the Barbacoas F ormation 
Reports of Professors Wolff and Turner 
The Panama Base Levelled Plain . 
Panama Bay . 
Continuation ‘of the Isthmian ‘Section across s the Telands and Waters 
of Panama Bay. . ` 
The Geologic F ormation of the Islands of Panama Вау. 
Evidence that they are a Remnant of the Mainland 
Résumé of the Isthmian Section . ` 
Classification of the Sedimentary Rocks. 
Pre-Eocene Formations 
Fossiliferous Tertiary Beds of the Caribbean Side 
Тһе Pleistocene Beds deposited synchronously on both Sides 
Conclusions concerning the Igneous Rocks "e 
Cordilleras of San Blas ES 
Тһе Older Granites e 
Age of the Basic Igneous Rocks Р 
Late Tertiary Syenitic Intrusions s n 
Post-Oligocene Folds of the Antillean Mountain System x 
Erosion and Base Levelling of the later Tertiary роон , 
The Monkey Hill and Panama Benches 
The Swamp Level à 
The Red Clays and Sub- areal Decay . 
Parr III. — Tug PaciFIC Coast FROM PANAMA TO o PUNTA ARENAS, Costa 
Rica "m . . М 
Topography of the Interior . Я 
Characteristic Elements of the Const 
Sketch of Mariato Point . ' 
Wave-cut Bluff and Elevated Base Levelled Plain 
Islands of Jicaron and Jicarita cidem 
Swampy Coasts of Burica 
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