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 GAY HEAD, MARTHA'S VINEYARD, 

 WITH REMARKS ON THE PHYLOGENY OF THE 

 GENUS CANCER. 



By Alpheus S. Packard. 



WITU TWO PLATES. 



