Thracia truncata, Alighels and Adams, 1842. 



Casco Bay to Eastport. 

 Thracia myopsis, Beck. 



Thracia couthouyi, Stimpson, 1851. 

 Casco Bay to Eastport. 

 ^ Pandora (CHdiophora) gouldiana, Dall. 

 Pandora triHneata, Stimpson, 1851. 

 Casco Bay to Eastport. 

 i^Lyonsia hyaHna (Conrad). 



Casco Bay to Eastport. 

 Lyonsia arenosa (Moller). 



Lyonsia arenata, Kingsley, 1901. 

 Casco Bay (Kingsley) ; North Haven, Penobscot Bay, 

 extremely rare (Henry Jackson, Jr.) ; rare at Frenchman's 

 Bay, only one specimen taken in 10 to 12 fath. (Blaney). 

 Poromya granulata, Nyst and \\'estendorp. 



Gulf of Maine, 150 fath. (Verrill). 

 Cuspidaria glacialis, G. O. Sars. 

 Nesera arctica, Verrill, 1872. 

 Nesera glacialis, Verrill, 1882. 

 Just outside Casco Bay, 50 to 95 fath. (Verrill, Kingsley) ; 

 Frenchman's Bay, one dead defective specimen, 25 fath. 

 (Blaney). 



Cuspidaria pellucida (Stimpson). 

 Nesera pellucida, Stimpson. 

 Casco Bay to Eastport. 

 Cuspidaria obesa, Loven. 



Nesera obesa, Verrill, 1882. 

 ^/ Gulf of Maine, 52 to 92 fath. (Verrill). 



Cyclas islandica (Linne). 



Cyprina islandica, Mighels, 1843; Gould, 1870. 

 ^ Casco Bay to Eastport. 



Astarte castanea (Say), 1822. 



Casco and Frenchman's Bays. 

 Astarte undata, Gould. 



Astarte sulcata, Stimpson, 1851. 



Casco Bay to Eastport. 



Astarte undata var. latisulcata (Hanley). 



Frenchman's Bay, 16 to 30 fath. (Blaney). ( 



