190 



Thracia, 

 T. Conradi. Found at Long Beach, Lynn, and Point Beach, 

 Swampscott, and found livings at Chelsea Beach. 



Mactra. 

 M. solidissima. Found on all the Beaches at Lynn. 

 M. lateralis. Found in City Mill Pond, Salem. 

 M. ovalis. Young, in stomachs of fish at Swampscott. 



Mesodesma, 

 M. arctata. Found on all of the Beaches. 



Montacuta. 

 M. bidentata. Found in stomachs of fish at Swampscott. 



Kellia. 

 K. rubra. In summer, on small sea- weed at Phillips Beach. 



Saxicava. 

 S. distorta. On the Beaches among the roots of kelp. 



Petricola. 

 P. pholadiformis. At low-water in clay, at King's Beach, 

 Lynn. 



Sanguinolaria. 

 S. fusca. Found on all the Beaches ; and fine large speci- 

 mens in City Mill Pond, Salem. 



Tellina. 

 T. tenera. Common on the Beaches. 



Lucina. 



L. filosa. Stimpson. Single valves; at Point Beach, 

 Swampscott — a dozen or more at that locality, some 2 3-4 in= 

 ches in diameter. 



L. flexuosa. Found in the stomachs of fish at Swampscot. 



Cyclas. 



C. elegans. ) 



C. truncata. > At Leggs-hill pond, Salem. 



C. sp. 3 



Pisidium. 



P. dubium. (Cyclas dubia. GoulcVs Catalogue.^ Found 

 at Leggs-hill pond. 



P. pusillum. Found in ditches in a field on a farm of Mr. 

 Horace Ware. 



P. minus. Cyclas minor of Dr. Mighels. This mollusk 

 is remarkable for Hying out of water a long time. I have 



