173 



JPisum rotundatum, H. & A. Adams, Loc. sup. cit. li, 660, 

 1858. 



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



Smith. Inst. Misc. Coll., Prime Monog. Corb. 72, f. 81, 

 82, 1865. U. S. of America. 



38. P. semen, Menke, Moll. N. Boll. 40, 1843. 



Pisum semen, Deshayes, Brit. Mus. Cat. Conchif. 284, 1854. 



Musculium semen, H. & A. Adams, Gen. Rec. Moll, ii, 660, 



1858. New Holland. 



39. P. simile, Prime, Cat. Corb. 15, 1863. 



Smith. Inst. Misc. Coll., Prime Monog. Corb. 69, f. 74, 1865. 



Guadeloupe, W. Indies. 



40. P. Steenbuehii, Morch. 



Cyclas SteenbuohUyMoller, Kroyer. Natur. Tids. iv, 76, 1842. 

 Sphcerium Steenbuchii, Deshayes, Brit. Mus. Cat. Conchif. 264, 



1854. 

 Pisidium Steenbuchii, Morch, Prod. Moll. Grb'nl. 19, 1857. 



Prime Cat. Corb. 17, 1863. Greenland. 



41. P. subtruncatum, Malm. Sweden. 



42. P. supinum, Schmidt, Zeit. Malak. 119, 1850. 

 Musculium supinum, H. & A. Adams, Gen. Rec. Moll, ii, 452, 



1858. 



Pisum supinum, H. & A. Adams, Loc. sup. cit. ii, 660, 1858. 



G-ermany. 



43. P. ultramontanum, Prime, Smith. Inst. Misc. Coll., 

 Prime Monog. Corb. 75, f. 85, 1865. California. 



44. P. variabile, Prime. 



Cyclas nitida, Linsley (non Mighles), Am. J. Sci. xlviii, 276, 



1845. 

 Pisidium variabile, Prime, Proc. Soc. N. H. Bost. iv, 163, 1851. 



J. N. H. Bost. vi, 351, pi. xi, f. 79, 1852. 

 Pisidium grande, Whittemore, in litt., 1855. 

 Pisidium palustre, Lewis, in litt. 

 Musculium variabile, H. & A. Adams, Gen. Rec. Moll, ii, 452, 



1858. 



Pisum variabile, H. & A. Adams, Loc. sup. cit. ii, 660, 1858. 

 Pisidium variabile, Prime, Cat. Corb. 14, 1863. 



Smith. Inst. Misc. Coll., Prime Monog. Corb. 66, f. 69, 



70, 1865. U. S. of America. 



45. P. ventricosum, Prime, Proc. Soc. N. H. Bost. iv, 68, 

 1851. 



Musculium ventricosum, H. & A. Adams, Gen. Rec. Moll, ii, 

 452, 1858. 



