118 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Vaugbau = D. crassolamellosa, Duncan (non Edward and Hairae) ^ ; 

 *Multicolumnastr8ea cyathiformis, (Duncan) = Heliastrsea exsculpta, 

 Duncan (non Eeuss) and Heliastrsea cyathiformis Duncan.^ Cyathoseris 

 haidingeri, Duncan (non Reuss)^; Porites reussiana, Duncan'^; Lepto- 

 phyllia agassizi, Vaughau. 



Echinodermata : Salenia. 



Conchifera : Pteroceras*; Nerinsea"; Cerithium ^ ; Turritella^; Ac- 

 tseonella^; Natica^; Araauropsis (1) ^ ; PleurotomariaC?) *; Ostrea*; 

 Pecten^; Inoceramus^; Lithodomus^; Pholadomya^; Barrettia mono- 

 lifera, Woodward ® ; Radiolites adherans, *R. rudis, Pt. cancellatus, P. 

 macroplicatus, R. annulosus, Whitfield ® ; *Caprina jamaicensis, Whit- 

 field^; Capri nella quadrangularis ^ ; Caprinella occidentalis, W^hitfield ^ ; 

 *Caprinella gigantea, Whitfield.^ 



Eossils marked with an asterisk are also reported from Cambridge 

 beds. 



This fauna is peculiar in its generic association, the numerical prepon- 

 derance of Rudistes and corals, the sparse representation of Pelecypoda, 

 and the almost complete absence of Echini, Cephalopoda, and Brachio- 

 poda, which so largely prevail in the IMarine Cretaceous, and its general 

 dissimilarity to Cretaceous faunas elsewhere than in the Great Antilles. 



Foraminifera abound in the rocks of the Jamaican sequence from the 

 limestone beds of the lower Blue Mountain Series' to the present, and 

 living forms occur in great quantities in the surrounding waters. The 

 fossil forms which will be frequently alluded to in this paper are of 

 many species ; some are of great diagnostic value, especially the species 

 of Orbitoides and Nummulinoe, which, as will be shown, are only found 

 doubtfully in the uppermost Cretaceous and Eocene (old usage) beds 

 of the island. A correct appreciation of the stratigraphic occurrence of 

 these and the other Foraminifera in the Jamaican sequence has been 

 greatly confused in literature by the writings of W. J. L. Guppy, who 

 published that they all came from beds of the Miocene age. Inasmuch 

 as his deductions have seriously misled other authorities, like Jones, 



> Identlfioil by T. W. Vaughan. Collected by Robert T. Hill, except the Cyatho- 

 Beris liai(liii<;eri. 



2 Ickntifiod by Duncan. Collected by Jamaican Surveys. 

 8 Identified by T. W. Stanton. Collected by Robert T. Hill. 

 * Identified by Woodward. Collected by Jamaican Surveys. 



5 Identified by Ktberidge. Collected by Jamaican Surveys. 



6 Identified by Whitfield. Collected by Nichols. 



■^ Tlie conditions of formation of the lower part of the Blue Mountain Series 

 'were in general unfavorable for their occurrence. 



