i 



1^1 





Icmoirs flf flje Puseum of (f omparatibc ^oiilogg 



AT HARVARD COLLEGE. 



Vol. XXX. No. 1. 



KEPORTS 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 COMMIS- 

 SION STEAMER "ALBATROSS," DURING 1891, LIEUT. COMMANDER 

 . Z. L. TANNER, U. S. N., COMMANDING. 



XXX. 



THE SPONGES. 



By H. V. WILSON. 



WITH TWENTY-SIX PLATES. 



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



of Fish and Fisheries.] 



CAMBRIDGE, U.S.A.: 



^rintei for t\}t jauseunu 

 July, 1904. 



yl 



6<^; 



COLLS : 



