Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVI. No. 1. — July, 1900. 



A NEW FOSSIL CRAB FROM THE MIOCENE GREEN- 

 SAND BED OF GAT HEAD, MARTHA'S VINEYARD, 

 WITH REMARKS ON THE PHTLOGENT OF THE 

 GENUS CANCER. 



By Alpiieus S. Packard. 



WITH TWO PLATES. 



