NO. 3 SMITHSONIAN EXPLORATIONS, IQIT5 
cn 
3 
As in previous years records on the birds observed on the Florida 
Keys and the southern portion of the peninsula were kept, and these 
observations have been published in the Year Book No. 14 of the 
Carnegie Institution for 1915, pages 197-199. The past two years 
have yielded a list of 76 species to which 13 were added this year, 
bringing the total list of birds noted to date to 8o. 
Fic, 68—Sooty terns (Sterna fuscata) on their nesting grounds, Bird Key, 
Tortugas. 
BIOLOGIC STUDY OR GHESAPE AK BA 
In October, 1915, the United States Bureau of Fisheries began 
a hydrographic and biologic study of Chesapeake Bay. The work 
being carried out under the direction of Mr. Lewis Radcliffe with 
the aid of the Fisheries steamer Fish Hawk. 
Two cruises were made in 1915. On the first, which extended 
from October 25 to October 28, Mr. Wm. B. Marshall, assistant 
curator, division of marine invertebrates, represented the National 
Museum, while on the second, which covered the period from Decem- 
ber 2 to 6, Mr. Clarence R. Shoemaker of the U. S. National Museum 
