164 



f" h. strictum, Normand. = Sph. Ryckholtii. 

 h. sulcatum, Lamarck. Sph. simile, 

 das sulculosa, Charpentier. = Sph. fabale. 

 Cyclas Sumatrensis, FeVussac ; un described. 

 Sph. tenuistriatum, Prime. = Sph. striatinum. 

 Cyclas tuberculata, Klees. = Sph. lacustre. 

 Cyclas tumida, Ziegler. = Sph. corneum. 

 Cyclas variegata, D'Orbigny. = Corb. limosa. 

 Cyclas Venezuelensis, Prime. = Sph. modioliforme* 

 Cyclas Virginica, Ferussac. = P. Virginicum. 

 Cyclas violacea, Lamarck. = B. violacea. 

 Cyclas vitrea, Risso. = P. casertanum. 

 Cyclas Zeylanica, Lamarck. = C. Ceylonica. 

 Sph. zonatum, Prime ; undescribed. 



Genus PISIDIUM, C. Pfeiffer. 

 System. Anord., 1821. 



Tellina, Muller, Verm, ii, 205, 1774. 



Sphcerium, Scopoli, Introduct. 397, 1777. 



Cardium, Poll, Test. Sicil. i, 65, pi. xvi, f. 1, 1791. 



Cyclas, Draparnaud, Tabl. Moll. 106, 1801. 



Pera, Cordula, Leach, in litt. in Mus. Brit. 1818-20. 



Physemoda, Rafinesque, Ann. gen. Sc. phys. et nat. v, 



1820. 



G-allileja, Costa, Corrisp. Zool., 1839. 



Pisum, Gray (non Megerle), Proc. Zool. Lond. xv, 184, 1847. 

 Musculium, Gray (non Link), 1851. 

 Pisum, Deshayes (non Megerle), Brit. Mus. Cat. Conchif.,, 



1854. 



Musculium, H. & A. Adams (non Link). 

 Pisum, H. & A. Adams (non Megerle), Gen. Rec. Moll, ii, 



1858. 



1. P. abditum, Haldeman. 



Pisidium abditum, Haldeman, Proc. Ac. N. S. Phila. 1, 53,. 



1841. 

 Cyclas minor* C. B. Adams, Proc. Soc. N. H. Bost. 1, 48> 



1841. J. N. H. Bost. iv, 39, pi. iv, f. 2, 1841. 

 Pisidium tenellum, Gould, Ag. Lake Super. 245, 1848. 

 Pisidium minus, Stimpson, Moll. N. E. 16, 1851. 

 Pisidium obscurum, Prime, Proc. Soc. N. H. Bost. iv, 161 r 



1851. 



Pisidium Kurtzi, Prime, Loc. sup. cit. iv, 162, 1851. 

 Pisidium zonatum, Prime, Loc. sup. cit. iv, 162, 1851. 

 Pisidium rubellum. Prime, Loc. sup. cit. iv, 163, 1851. 



