/ PIAK 4 11 



CONTRIBUTIONS TO THE GEOLOGY AND PALAEONTOLOGY 

 OF THE WEST INDIES 



FOSSIL ECHINI OF THE WEST INDIES 



By ROBERT TRACY JACKSON 

 fit 



STRATIGRAPHIC SIGNIFICANCE OF THE SPECIES 



OF WEST INDIAN FOSSIL ECHINI 



By THOMAS WAYLAND VAUGHAN 



PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON 

 WASHINGTON, 1922 



