hill: geology of Jamaica. 231 



Arranging the other species according to Hill's stratigraphic succes- 

 sion, we have : — 



Cretaceous. 



Blue Mountain Series. Cladocora jamaicaensis, sp. nov. ; Leptophyllia 

 agassizi, sp. nov. ; Solomon Mountain. Stiboriopsis jamaicaensis, sp. 

 nov., Craigie, Parish of Hanover. Multicolumnastra;a cyathiformis 

 (Duncan), Mount Hindmost, Trout Hall, and Cupius. Diploria con- 

 ferticostata, sp. nov. ; Trout Hall and Upper Clarendon District, 

 Pennants in Upper Clarendon District. Porites reussiana, Duncan, 

 Upper Clarendon District. 



Eocene. 



Richmond Beds. Stylophora contorta, Leymerie sp. (fide Duncan), 

 Port Maria. Astrocoenia duerdeni, sp. nov.. Port Maria and Point Hal- 

 dane, St. Mary Parish. ] Columnastrsea eyeri, Duncan, Locality^ 



Cambridge Beds : Turbinoseris jamaicaensis, sp. nov. ; Turbinoseris 

 cantabrigiensis, sp. nov. ; Dendracis cantabrigiensis, sp. nov. ; near 

 Cambridge Station. 



Catadupa Beds. Trochosmilia hilli, sp. nov. ; Multicolumnastrsea 

 cyathiformis (Dxincan) ; Diploria conferticostata, sp. nov. ; Diploria con- 

 ferticostata, var. columnaris, var. nov. ; Trochoseris catadupensis, sp. 

 nov. ; Mesomorpha catadupensis, sp. nov. ; Catadupa. 



We appear to have in these corals the unusual condition of several 

 Cretaceous species ranging far up into the Eocene. Mr. Hill has a 

 lengthy discussion of this subject in his report on Jamaica. 



There are six species from the Blue Mountain Series. As two of 

 them belong to new genera, any evidence for geologic age must be 

 drawn from the remaining four. The genus Cladocora ranges from 

 Jurassic to present time, so the first species is indefinite in its evidence. 

 Leptophyllia is Jurassic, Cretaceous, and Eocene, but the Jamaican species, 

 L. agassizi, seems more closely related to the Cretaceous forms. The 

 range of Diploria is from Cretaceous to the present. The nearest species 

 to D. conferticostata is an Italian Eocene species. The genus Porites is 

 a Tertiary genus, and if Duncan's generic diagnosis is correct, the Porites 

 reussiana would argue for the age of the beds in the Upper Clarendon 

 District being at least not older than Eocene. If the genus of the 

 species should be Litharcea^ as I suspect to be the case, it might be 

 Cretaceous, but it seems more closely related to some of the Eocene 

 species. It seems to me that there are two faunas in the Blue Mountain 



