120 Recent Literature. [ February, 
to some of the best men in Germany, who combine with a thorough 
+ 
t 
s A 
Fig. 11.—Group of a female colony of Hydractinia echinata Enlarged. 
special knowledge, the art of setting forth in an interesting and at- 
tractive way the “history of animal ‘life. 
TENTH ANNUAL REPORT OF THE UNITED STATES GEOLOGICAL 
AND GEOGRAPHICAL SuRVEY, F. V. HAYDEN IN CHARGE. 1_This 
1 Tenth Annual Report of the United etnies Geological and Geogr aphical ait vey sd 
aee Territories, embracing Colorado and parts of adjacent Territories. Bei 
rt of progress of the Exploration for the ete 1876. By F. V. HA roa; U- 
G raa Washington, 1878. 8vo, pp. 546, with many maps ¢ and plates. 
