AMERICAN 



TX-VoaJ 



Division oi Molluska 

 Sectional library 



MARINE C0NCH0L0G-Y: 



DESCRIPTIONS OF THE SHELLS 



ATLANTIC COAST OF THE UNITED STATES 



FROM MAINE TO FLORIDA. 



BY 



GEORGE W. TRYON", Jr., 



MEMBER OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. 



PHILADELPHIA: 



PUBLISHED BY THE AUTHOR 



No. 19 North Sixth Street. 



