174 



Pisum ventricosum, H. & A. Adams, Loc. sup. cit. ii, 660, 18581. 



Pisidium ventricosum, Prime, Cat. Corb. 15, 1863. 



Smith. Inst. Misc. Coll., Prime Monog. Corb. 72, f. 79, 

 80, 1865. U. S. of America- 



46. P. Virginicum, Bourguignat. 



Tellina Virginica, Gmelin, Syst. Nat. 3236, pi. clix, f. 15, 



1788. 



Tellina pusilla (pars), Dillwyn, Cat. ii, 106, 1817. 

 Cyclas dubia, Say, Nichols. Encycl. 1st Amer. edit, ii, 4, pi.. 



i, f. 10, 1817. 

 Physemoda cequalis, Rafinesque, Ann. gen. Sci. phys. et nat^ 



v, 319, 1820. 



Cyclas Virginica, Ferussac, Mag. Zool. v, 1835. 

 Cyclas dubia, Say, Gould Invert. 75, f. 56. 1841. 

 Pisidium abruptum, Haldeman, Proc. Ac. N. S. Phila. i, 53 r , 



1841. 



Pisidium dubium, Haldeman, Loc. sup. cit. i, 103, 1841. 

 Cyclas dubiosa, Catlow & Reeve, Nomencl. 29, 1845. 

 Pisidium dubium, Say, J. N. H. Bost. vi, 354, pi. xi, f. 4 6 ?! 



1852. 



Pisidium cequale, Rafinesque, Loc. sup. cit. vi, 367, 1852. 

 Pisidium Virginicum, Bourguignat, Rev. Mag. Zool., 1854. 

 Sphcerium dubium, Deshayes, Brit. Mus. Cat. Conchif. 266,. 



1854. 



Pisum Virginicum, Deshayes. Loc. sup. cit. 281, 1854. 

 Pisum abruptum, Deshayes, Loc. sup. cit. 281, 1854. 

 Pisum dubium, Deshayes, Loc. sup. cit. 282, 1854. 

 Musculium dubium, H. & A. Adams, Gen. Rec. Moll, ii, 451,. 



1858. 

 Musculium abruptum, H. & A. Adams, Loc. sup. cit. ii, 451, 



1858. 

 Musculium Virginicum, H. and A. Adams, Loc. sup. cit. ii,. 



452, 1858. 

 Pisidium Virginicum, Bourguignat, Prime, Cat. Corb. 13,. 



1863. Smith. Inst. Misc. Coll., Prime Monog. Corb. 



61, 62, 1865. U. S. of America^, 



TO BE EXCLUDED. 



Pisidium abruptum, Haldeman. = P. Virginicum. 

 Pisidium acutum, Pfeiffer. = P. Henslowianum. 

 Pisum Adamsi, Deshayes. = P. Jamaicense. 

 Physemoda cequalis, Rafinesque. = P. Virginicum. 

 Pisidium altile, Anthony, = P. compressum. 

 Pisidium amplum, Ingalls. = P. Nov.-Eboracense. 



