20% BULLETIN: MUSEUM OF COMPARATIVE ZOÓLOGY. 
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 Stylocenia duerdeni and Stylocenia 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, Reuss. 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 Multicolumnastrea 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 Stylocania, 
identified by Duncan as emarciata. "The stratigraphic affinities of the 
Jamaican species for European species are the same as those of the 5t. 
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 
Flabellum, Turbinolia, Sphenotrochus, Caryophyllia, Trochocyathus, Para- 
cyathus, Discotrochus, Platytrochus, Parasmilia, Hupsammia, Balano- 
phyllia, Endopachys, and Stephanophyllia. 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. 
