IO 



Astarte quadrans, Gould. 



Casco Bay to Eastport. 

 Astarte portlandica, Mighels. 



Casco Bay to Eastport. 

 Astarte elliptica (Brown). 



Casco Bay (Kingsley) ; six miles east of Seguin, 33 



fath. (Verrill). 



Astarte subsequilatera, Sowerby. 

 Astarte crebricostata, Gould. 

 Astarte lens, Stimpson MSS., Verrill, 1873. 



Casco Bay to Eastport. 

 Astarte borealis, Schumacher. 



Astarte semisulcata, Gould, 1870. 



Frenchman's Bay, rare, only valves (Blaney) ; 

 Machias Bay (Fuller); off Treats Island, Eastport 

 (Fuller). 



Astarte striata (Leach). 

 Astarte banksi, Leach. 



Frenchman's Bay, 20 fath., rare, only valves (Blaney). 

 Venericardia borealis, Conrad. 



Cardita borealis, Mighels, 1843, Stimpson, 1851. 

 Cyclocardia borealis, Verrill, 1873. 



Casco Bay to Eastport. 

 Venericardia novangliae (Morse), 1869. 



Cardita (Venericardia) borealis var. novanglise, Dall, 1903. 



Casco Bay to Eastport. 

 Phacoides filosus (Stimpson). 



Lucina filosa, Stimpson, 1851. 



Old Orchard Beach, single valve (Norton) ; Casco 

 Bay (Kingsley) ; Portland Harbor (Fuller) ; near 

 Machias (Capt. Walden). 

 Thyasira gouldi (Philippi). 



Lucina flexuosa, Gould, 1841. 

 Cryptodon gouldi, Gould, 1870. 



Casco Bay to Eastport. 

 Thyasira plana (Verrill and Bush). 



Casco Bay (Verrill); Frenchman's Bay (Blaney). 

 Thyasira trisinuata (d'Orbigney). 

 Cryptodon obesus, Verrill, 1873. 



