HUmoirs of tlje ffiusnim of Comparaiibe ioblogn 



AT HARVARD COLLEGE. 

 Vol. XXXI. 



REPORTS ON AN EXPLORATION OFF THE WEST COASTS OF MEXICO, 

 CENTRAL AND SOUTH AMERICA, AND OFF THE GALAPAGOS ISLANDS, 

 IN CHARGE OF ALEXANDER AGASSIZ, BY THE U. S. FISH COMMISSION 

 STEAMER " ALBATROSS," DURING 1891, LIEUT. COMMANDER Z. L. 

 TANNER, U. S. N., COMMANDING. 



XXXII. 



THE PANAMIC DEEP SEA ECHINI. 



By ALEXANDER AGASSIZ. 



ONE VOLUME TEXT, 



WITH ONE HUNDRED AND TWELVE PLATES, 



INCLUDING A CHART OF THE ROUTE, AND 319 FIGURES IN THE TEXT. 



PLATES. 



[Published by Permission of Marshall McDonald and George M. Bowers, U. S. Commissioners 



of Fish and Fisheries.] 



CAMBRIDGE, U. S. A. : 



IPrinteti for tlje Jluscum. 

 1904. 



