UNITED STATES 
EXPLORING EXPEDITION. 
1888, 1889, 1840, 1841, 1842. 
UNDER THE COMMAND OF 
Orr A RL Ba We a Kk Ee 
Division of Molluske 
Sectional Tibratv 
ATLAS. 
MOLLUSCA AND SHELLS. 
BY 
AUGUSTUS A. GOULD, M.D. 
SCIENCES AND OF THE AMERICAN PHILOSOPHICAL SOCIETY ; 
MEMBER OF THE ACADEMY OF NATURAL SCIENCES AT PHILADELPHIA; OF THE 
BOSTON SOCIETY OF NATURAL HISTORY, ETC. 
BY AUTHORITY OF CONGRESS. 
| PHILADELPHIA: 
C. SHERMAN & SON, PRINTERS. 
1856. 
