GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 



219 



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

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

 stitution of Washington. The corals arc as follows: 



Fossil corals from the La Cruz marl, Cuba. , 



Name. 



Siylopliora affinh Duncan 



Pocillnpora spceios 



Stephanocoevia intersepta (Espcr) 



Orbkdla limbata (Duncan) 



Solenastrea hyades (Dana) 



bournoni M. ]<;clwards and Haime . 



Thysanus aff . T. excentrkus Duncan 



Siderastrea sidcrca ( Ellis and Solander) 



Ooniopora jacobiava Vauglian 



Porites porites (Pallas) 



astreoides (Lamuck) 



Santx) 



Domingo 



above 



zone If. 



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 Placocyatlius, Asteros7niUa, Antillia, Thysanus, 

 and Syzygo'ph.yllia, 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 Ohipola marl, member of Alum Bluff forma- 

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

 namely, Styloj^Jwra, 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. 



A strhciia new species 



Siderastrea Mllsboroensis Vaughan. 



silecensis Vaughan 



Goniopora jacobiana Vaughan 



' 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 

 should be referred to the Miocene, I beheve it is very low Miocene, 



