This paper constitutes a general summary of the field and laboratory work on the Jurassic of Cuba thus far completed by the authors. It is based on personal studies made by Mr. Brown in Cuba during five journeys, covering eleven months of field work and exploration, in those provinces west of Camaguey, and on the results obtained by Miss O’Connell in working up the collections of fossils, the identification of which has made possible the determination of the succession of the paleontological zones and the correlation of the strata with synchronous ones in Mexico and Europe. The Jurassic fauna, consisting mainly of ammonites, has been described in a separate memoir, to be published at a later date, but the broad stratigraphic results may here be set forth in advance of the paleontological details.
Since the beginning of the nineteenth century, when Alexander von Humboldt2 visited Cuba . . .