GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION. 



List of Fossil Echini occurring in the Island of Porto Rico. 



Species. 



Cidaris peloria, sp. nov 



Cidaris sp. a 



Cidaris sp. b 



Echinometra prisca Cotteau 



Clypeaster rosaceus (LinnS) 



Clypeaster concavus Cotteau 



Clypeaster oxybaphon, sp. nov. . . . 

 Echinarachnius sebastiani, sp. nov. 



Encope latus, sp. nov 



Echinolampas lycopersicus Guppy. 



Hemiaster berkeyi, sp. nov 



Paraster loveni (Cotteau) 



Eupatagus depressus, sp. nov 



Eupatagus elegans. sp. nov 



Cretaceous. 



Oligocene. 



X 

 X 



X 



X 

 X 

 X 



Geologic age 

 doubtful. 



months of June and July 1915. Some of the results of the work of 

 this Scientific Survey of Porto Rico have already appeared in the 

 publications of the New York Academy of Sciences. In his Geological 

 Introduction (1919, New York Academy of Sciences, vol. I, part 1), 

 Professor C. P. Berkey gives an account of the geological features 

 of the island and a discussion of the age of the rock formations. Miss 

 Carlotta J. Maury (1920, New York Acad. Sciences, vol. Ill, part 1) 

 describes the Tertiary molluscs of Porto Rico and gives a table of 

 the correlation of Tertiary formations of Porto Rico with other West 

 Indian islands. 



ANGUILLA. 



List of Fossil Echini occurring in the Island of Anguilla. 



Cidaris anguilla; Cotteau. 

 Cidaris clevei Cotteau. 

 Cidaris melitensis Wright. 

 Echinometra prisca Cotteau. 

 Sismondia anguilla; Cotteau. 

 1 Clypeaster rosaceus (Linnfe). 

 Clypeaster concavus Cotteau. 

 Clypeaster antillarum Cotteau. 

 Echinoneus cyclostomus Leske. 

 Echinolampas semiorbis Guppy. 



Echinolampas lycopersicus Guppy. 



Echinolampas anguilla; Cotteau. 



Agassizia clevei Cotteau. 

 1 Paraster parkinsoni (Defrance). 



Paraster clevei (Cotteau). 



Paraster loveni (Cotteau). 

 1 Brissopsis atlantica Mortensen. 



Brissopsis antillarum Cotteau. 



Macropneustes clevei (Cotteau). 



Brissus exiguus Cotteau. 



These species of Echini from Anguilla were for the most part in- 

 cluded in the Guppy ex Cleve collection, which was made by Professor 

 P. T. Cleve in 1868-69, and on which was based Cotteau's memoir 

 on the fossil Echini of the islands of St. Bartholomew and Anguilla. 

 Additional material has since been collected on the island by J. W. 

 Gregory in 1899 and by T. W. Vaughan in 1914. Lambert reports 



'Lambert, 1915, Mem. Soc. d'Agric. de 1'Aube (Troyes), vol. 79, pp. 17-34. 

 *A. Agassii, 1883, Mem. Mui. Comp. ZocU.. vol. 10, No. I, p. 94. 



