Copyright, 1888, 

 Br ALEXAUDEK AGASSIZ. 



AU rights reserved. 



[Pnblished by permissiou of Caruls P. Fatteeson and Juuus E. Hn£ABi>, 

 Superintendents 0. S. Coast and Geodetic Surrey.] 



The Riverside Press, Cambridge : 

 Electrotjped and Printed by H. O. Houghton & Oa 



