222 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



oceanic connection during Miocene time, although there was such 

 connection in other areas not far away, in Nicaragua for instance. 

 During the Miocene there was a very weak development of reef- 

 corals in Central America, the Antilles, and the southeastern United 

 States, as the foregoing lists show. The Miocene is characterized by 

 the disappearance of many genera of corals that were abundant in 

 the middle and upper Oligocene and by the introduction of the modern 

 coral-fauna. However, a number of genera at present known living 

 only in the Indo-Pacific persisted. These genera are as follows: 

 Placotrochus. Pocillopora. Syzygopliyllia. 



Placocyathus. Antillia. Pavona. 



Siylophora. Favites. Goniopora. 



Of the Miocene genera, AsirJulia, Septasirea,, and Thysanus are not 



known living. 



Pliocene. 



CALOOSAHATCHEE MARL, FLORIDA. 



The following species of corals have been recognized in the Caloosa- 

 hatchee marl: 



*Archohelia limonensis Vaughan. 

 Dichocoenia new species 1. 

 new species 2. 

 Meandrina maeandrites (Linnaeus). 

 Cladocora johnsoni Gane. 

 Phyllangia floridana Gane. 

 *Solenastrea hyades (Dana). 



*bournoni M. Edwards and Haime. 

 Septasirea crassa (Tuomey and Holmes). 

 Thysanus species. 

 Maeandra pliocenica (Gane). 



aft*. M. strigosa (Dana), 

 aft. M. clivosa (Ellis and Solander). 

 *Siderastrea pliocenica Vaughan. 



*dalli Vaughan. 

 *Porites porites (Pallas). 

 *furcata Lamarck. 

 divaricata Le Sueur. 

 Those species whose names are preceded by an asterisk are con- 

 sidered in the descriptive part of this paper. 



The foregoing list is complete for the Caloosahatchee corals from 

 Caloosahatchee River and Shell Creek, Florida, except one species 

 of whose genus I am not sure. There are in the United States 

 National Museum 19 species from the Caloosahatchee marl. Of 

 these 19 species, 6 and perhaps 8 are also living in the Floridian 

 region, while the other species, except those belonging to Septasirea 



