GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 225 



in the Miocene. It is not Pliocene , according I o our present knowledge 

 of Pliocene coral faunas.. 



Pleistocene. 



Onl\" the names of the Pleistocene species considered in this paper 

 are given in the following lists : 



Pleistocene corals from Mount Hope and Colon, Canal Zone. 



Oculina diffusa Lamarck. 



varicosa Le Sueur. 

 Eusmilia fastigiata (Pallas). 



Astrangia (Phyllangia) americana M. Edwards and Haime.^ 

 Cladocora arhuscula Le Sueur. 

 Solenastrea hournoni Milne Edwards and Haime. 

 Favia fragum (Esper). 

 Maeandra areolata (Linnaeus). 

 Manicina gyrosa (Ellis and Solander). 

 Agaricia agaricites (Linnaeus). 



var. purpurea Le Sueur. 

 pusilla Verrill. 

 Siderastrea radians (Pallas). 



siderea (Ellis and Solander). 

 Acropora muricaia (Linnaeus)' 



palmata (Lamarck) at Colon. 

 Porites furcata Lamarck. 



astreoides Lamarck. 

 Millepora alcicornis Linnaeus. 



It will be remarked in passing that the coral fauna at Mount 

 Hope is a typical inner-flat coral fauna. 



Pleistocene specimens were obtained at Monkey Point and Limon, 

 Costa Rica. The list is as follows : 



Pleistocene corals from Monlcey Point and Limon, Costa Rica. 



Name. 



Eusmilia fastigiata (Pallas) 



Maeandra clivosa (Ellis and Solander). . 



strigosa (Dana) 



Manicina gyrosa (EiUs and Solander)... 

 Agaricia agaricites var. crassa Verrill . .. 

 Siderastrea siderea (rAUs and Solander). 



Acropora muricaia (Linnaeus) 



palmata Lamarck 



Porites furcata Lamarck 



Monkey 

 Point. 



Limon 

 MoinHill 



The corals from Monkey Point represent a seaward-facing reef; 

 while those from Moin Hill are more characteristic of inner-flat 

 conditions. 



1 Names added in the proof and not entered in the table of species, pp. 228-237., or the systematic 

 account of the faunas. 



