GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 225 



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

 of Pliocene coral faunas. 



Pleistocene. 



Only 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. 1 

 Cladocora arbuscula Le Sueur. 

 Solenastrea boumoni 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 muricata (Linnaeus) 1 



palmata (Lamarck) at Colon. 

 Pontes 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 Monkey Point and Limon, Costa Rica. 



Name. 



Monkey 

 Point. 



Limon 

 Moin Hill 



Eusmilia fastigiata (Pallas) X 



Maeandra clivosa (Ellis and Solander) X 



strigosa (Dana) 



Manicina gyrosa (Ellis and Solander) 



Agaricia agaricites var. crassa Verrill 



Siderastrea siderea (Ellis and Solander) ' 



Acropora muricata (Linnaeus) X 



palmata Lamarck I X 



Poritcs furcata Lamarck - ' 



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. 



