180 BULLETIN: MUSEUM OF COMPAEATIVE ZOOLOGY. 



I have no hesitation in considering this bed synchronous in age with the 

 Montpelier chalk of Jamaica. 



In Cuba foraminiferal white limestones of the Montpelier type have 

 wide extent, especially in the western and central portions of the island, 

 notably in Havana and Matanzas. 



The Eocene system of Cuba, as described by Castro,^ Salterain,'^ and 

 Valentin Peleterro,^ undoubtedly includes the equivalents of our Cam- 

 brido-e and Montpelier beds. Among the characteristic fossils are Orhi- 

 toides mantelli and Aturia zigzag, Sow., the latter from La Criolla, near 

 Havana, and from the Sierra de Santiago.* According to Salterain, this 

 is also the same species as that called Nautilus cubaensis by Lea.^ These 

 fossils occur in a white limestone very much like that of the Montpelier 

 beds of Jamaica, and have wide occurrence. 



That the Cambridge and Montpelier beds have extensive development 

 in Haiti and San Domingo there can be no doubt. This the reader 

 can readily ascertain, if, after reading this report, he will peruse the 

 descriptive portions of Gabb's Geology of San Domingo, although 

 Gabb does not differentiate the white limestones of the upland or in- 

 terior from that of the coast formations, but confuses them together 

 under the head of the Coast Limestone, in the very untenable thesis on 

 pages 103-112. In numerous places in the descriptive portion of his 

 report the upland limestones are described in a manner that leaves no 

 doubt not only as to their existence but also their differentiation into 

 the several kinds we have described from Jamaica and Cuba. He notes 

 in many places the occurrence of Orbitoides, and says,^ " It has more 

 than once proven of great value to me in distinguishing these limestones 

 from the overlying Post-Pliocene calcareous beds." Furthermore, on 

 page 144 of his report, he speaks of a Nummulite form which is found 

 throughout the Dominican " Miocene from the blue shale at its base 

 to the top of the series." In his unpublished manuscript in the Library 

 of the United States Geoloii^fical Survev, entitled " Additional Xotes on 

 the Topography and Geology of San Domingo," he further comments on 



1 Pruebas Paloontologicas, etc. 



2 Apuntes para una ])escripoion Fisico Geoldgica de la Ilabana y Guanabaco.a, 

 Madrid, 1880, pp. 30-40. 



3 Apuntes Geol(>gicos referentes al Itinerario de Sagua de Tanamo a Santa Cata- 

 lina de Guantananio. Boletin de la Comision del ISIapa Geologica de Espana, Tomo 

 XX. pp. 80-08, Madrid, 1805. 



4 Salterain, loc. cit., p. 37. 



6 Trans. Am. Phil. Soc, 2d Series, Vol. VIL, Plate X. Fig. 15. 

 f' Page 96. 



