CONTENTS. XV 



Fossil Corals from Central America, Cuba, and Porto Rico, etc. — Continued. 

 Systematic account of the faunas — Continued. 



Class Anthozoa— Continued . Page.. 



Madreporaria Fungida 425 



Family Agariciidae 425 



Genus Troclioseris 425 



Agaricia 426 



Pavona 430 



Leptoseris 431 



Pironastraea. 432 



Siderastrea 435 



Family Oulastreidae 453 



Genus Cyathomorpha 454 



Diploastrea , 469 



Madreporaria Perforata 479 



Family Eupsammiidae 479 



Genus Balanophyllia 479 



Family Acroporidae 479 



Genus Acropora 479 



Astreopora 48$ 



Actinacis 486 



Family Poritidae 488 



Genus Goniopora 488 



Pontes 498 



Class Hydrozoa 507 



Order Hydrocorallinae 507 



Family Milleporidae 507 



Genus Millepora 507 



Explanation of plates 507 



Index i 



The sedimentary formations of the Panama Canal Zone, with special 

 reference to the stratigraphic relations of the fossiliferous beds. 



By Donald Francis MacDonald 525 



Introduction 525 



Sedimentary formations 526 



Eocene (?) , 526 



Bas Obispo formation 526 



Las Cascadas agglomerate 526 



Oligocene 526 



Bohio conglomerate 526 



Culebra formation 527 



Cucuracha formation 527 



Emperador limestone 531 



Caimito formation 531 



Miocene 531 



Gatun formation 531 



Panama formation 532 



Pliocene 532 



Toro limestone 532 



Chagres sandstone 532 



Pleistocene 532 



Descriptions of local sections across the Isthmus of Panama 532 



Section in canal cut 600 feet south of Miraflores Locks 533 



Section at Canal Commission station 2089 south of Miraflores Locks . . . 533 

 8370 — 19 — —ii 



