SMITHSONIAN INSTITUTION. 



UNITED STATES NATIONAL MUSEUM. 



REVISION OF THE DEEP-WATER MOLLUSCA OF 

 THE ATLANTIC COAST OF NORTH AiM ER- 

 ICA, WITH DESCRIPTIONS OF NEW 

 GENERA AND SPECIES. 



PART I BIVALV1A. 



BY 



ADDISON E. VERRILL, 



Professor of Zoology in Yale University, 

 nnd 



KATHARINE J. BUSH, 



Assistant in Peal'i'dy Museum o/ Yale University. 



From the Proceedings of the United States National Museum, Vol. XX, pages 775-901 



(with Plates LXX1-XCVI1). 



[No. 1139.] 



WASHINGTON! 



GOVERNMENT PRINTING OFFICE. 

 1898. 



