GEOLOGY AND PALEONTOLOGY OE THE CANAL ZONE. 



219 



formation are listed below. Descriptions of the mollusca by C. W. 

 Cooke will appear in a forthcoming publication of the Carnegie In- 

 stitution of Washington. The corals are as follows: 



Fossil corals from the La Cruz marl, Cuba. 



Name. 



Stylophora affinis Duncan 



Pocillopora species 



Stephanocoenia intersepta (Esper) 



Orbicella limbata (Duncan) 



Sglenastrea hyades (Dana) 



bournoni M. Edwards and Haime . 



Thysanus aff. T. excentricus Duncan 



Siderasirea siderea (Ellis and Solander) 



Goniopora jacobiana Vaughan 



Pontes pontes (Pallas) 



astreoides (Lamuck) 



Santo 



Domingo 



above 



zone H. 



Santo 



Domingo 



zone H 



Bowden. 



Recent. 



Of 11 species listed above, 5 are now living in the Antillean re- 

 gion; but of the 8 genera represented, 4, i. e. 50 per cent, are now un- 

 known in the Atlantic Ocean. The horizon appears to be above that of 

 the Bowden marl, and to be near zones D and E of the table on 

 page 217. I obtained numbers of poor prints and casts of corals 

 near or at the base of the formation in the vicinity of Santiago. 

 Although they are too poor for determination, they resemble in 

 form the "species of Placocyathus, Asterosniilia, Antillia, Thysanus, 

 and Syzygophyllia, of the Santo Domingan deposits. Similar poor 

 casts and imprints suggest that this is a widely distributed formation 

 in Cuba. 



FLORIDA. 



ALUM BLUFF FORMATION. 



The coral fauna of the Chipola marl, member of Alum Bluff forma- 

 tion is small, comprising four species representing as many genera, 

 namely, Stylophora, Antillia, a new genus that resembles a Thysanus 

 with a commensal sipunculid worm in its base, and Goniopora. 



The coral fauna of the Alum Bluff formation is meager. Exclud- 

 ing the Chipola marl member it comprises the following species: 



Fossil corals from the Alum Bluff formation? 



Name. 



Oak 

 Grove. 



White 

 Springs. 1 



Tampa 

 brick- 

 yard. 



Astrhelia new species 



Siderastrea Mllsboroensis Vaughan. 



silecensis Vaughan 



Goniopora jacobiana Vaughan 



1 For description of the stratigraphic relations of beds at White Springs see Vaughan, T.W., and Cooke, 

 C. W., Correlation of the Hawthorne formation, Washington Acad. Sci. Journ., vol. 4, pp. 250-253, 1914.^ 



Although, in my opinion, the formation in which these corals occur 

 shouldbe referred to the Miocene, I believe it is very low Miocene, 



