232 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



Series, one from Solomon Mountain and most probably Cretaceous ; the 

 other from the Clarendon District, practically identical with the Catadupa 

 fauna, might be Eocene in age. 



The Richmond beds are undoubtedly Tertiary, and from the similarity 

 between StyJocoenia duerdeni and Stylocoenia emarciata^ I believe Dun- 

 can was correct in referring the beds whence they were derived to 

 the Eocene. 



The Cambridge beds can be referred to the Eocene (or possibly 

 Oligocene) on the strength of their containing abundant specimens of 

 Dendracis. This genus is not known from rocks older than Eocene or 

 younger than Oligocene. Both specimens and species are abundant in 

 Southern Europe and Northern Africa in strata of these ages. 



The Catadupa beds also can probably be referred to the Eocene on 

 the evidence of the Trochosmilia, which has a near European relation in 

 T. acutimargo, Eeuss. The Diploria also has a European relation. 

 Trochoseris is a doubtfully Cretaceous genus; it occurs in the Eocene, 

 and there is a recent species. The occurrence of the species of Diploria 

 and Multicolumnastrcea in the Blue Mountain Series has been noted. 



The faunas from the Richmond, Cambridge, and Catadupa beds seem 

 quite different from the St. Bartholomew fauna, described by Duncan. 

 Apparently they possess only one species in common, viz. the Styloccenia, 

 identified by Duncan as emarciata. The stratigraphic affinities of the 

 Jamaican species for European species are the same as those of the St. 

 Bartholomew corals, and I believe more extensive study and collecting 

 will show considerable resemblance, — especially after a revision of 

 Duncan's types from St. Bartholomew. 



A very interesting fact is the great difference between the Eocene 

 corals of Jamaica and those from the United States. I am very familiar 

 with the Eocene corals from the latter, having just prepared an exten- 

 sive monograph on them. So far not a single species common to both 

 has been found. Eocene corals are very abundant in the United States, 

 but they are mostly simple species belonging in large part to the genera 

 Flahellum^ Turbinolia, Sphenotrochus, Caryophyllia^ Trochocyathiis^ Para- 

 cyatkus, Discotrochus, Plafytrochiis, Parasmilia, Eupsammia^ Balano- 

 phyllia, Endopachys, and StephanophylUa. Oculina, Madracis, and Den- 

 drophyllia are well represented. In the Oligocene deposits of Mississippi, 

 Alabama, and Florida, there are many compound forms. A species of 

 Mesomorpha occurs in the Lower Eocene (Midway beds) of Alabama. 



