CONTRIBUTIONS TO THE GEOLOGY AND PALAEONTOLOGY 



OF THE WEST INDIES 



FOSSIL ECHINI OF THE WEST INDIES 



By ROBERT TRACY JACKSON 



STRATIGRAPHIC SIGNIFICANCE OF THE SPECIES 

 OF WEST INDIAN FOSSIL ECHINI 

 By THOMAS WAYLAND VAUGHAN 



PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON 



WASHINGTON, 1922 



