280 A. S. PACKARD, Jr., ON THE RECENT 



Modiolaria laevigata Gray. 



This species was taken with the preceding. 



Modiolaria faba Fabe. 



Henley Harbor, four fathoms. 



Modiolaria discrepans Mull. 



A valve two inches long was taken from the stomach of a cod caught on the Bank, in 

 the Straits of Belle Isle. Thirty fathoms, Square Island. 



Mytilus modiolus Linn. 



This species was not common. 



Mytilus edulis Linn. 



This species was found in great abundance. 



Alasmodonta arcuata Barnes ? 



I was told that a fresh-water mussel was common in Salmon River. This must be the 



same shell that Professor P. A. Chadbourne informs me is very abundant in the streams of 



Newfoundland. 



Pisidium Steenbuehii (Moll.) 



Abundant in fresh-water streams and swampy land at Square Island and Strawberry 

 Harbor. 



Cryptodon Gouldii Phil. 



Very large and abundant ; a few in fifty fathoms, Straits of Belle Isle. Long Island, 

 fifteen fathoms. Chateau Bay, fifty fathoms. 



Cardita borealis Conr. 



On a bank in fifty fathoms, Straits of Belle Isle. Long Island, fifteen fathoms. Chateau 

 Bay, fifty fathoms. 



Cardium pinnulatum Conr. 



Very common, and as large as usual southward. It did not occur north of the Straits of 

 Belle Isle. 



Serripes groenlandicus Beck. 



This is a very abundant species, and is a very constant companion of Cardium islandicitm, 

 occurring in a mixed sand and mud bottom in ten to twenty fathoms, where it grows to an 

 enormous size. 



It varies considerably when old, some specimens being triangular and flattened, with the 

 beaks placed far anteriorly, while other shells are ventricose, oval, with the beaks very 

 central. The young all agree in being short and high, very thick, and in having the large, 

 swollen beaks placed nearly in the middle of the shells. Some specimens from Greenland 



