Copyright, 1888, 

 By ALEXANDER AGASSIZ. 



All rights reserved. 



[Published by permission of Carlile P. Patterson and Julius E. IIiigard, 

 Superintendents U. S. Coast and Geodetic Survey.] 



The Riverside Press, CambrirlLr : 

 Bectrotyped and Printed by H. O. Houghton & Oo. 



