173 



~Pisum rotimdatum, H. & A. Adams, Loc. sup. cit. li, 660, 

 1858. 



Pisidiuni rotimdatum, 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. Holl. 40, 1843. 



Piswn semen, Desbayes, Brit. Mus. Cat. Conchif. 284, 1854. 



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



1858. Netv Holland. 



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



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



Q-uadeloupe, W. Indies. 



40. P. Steenbuchii, Mbrch. 



Oyclas Steenhuckii, Mbller, Krbjer. Natur. Tids. iv, 76, 1842. 

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



1854. 

 Pisidium Steenbuchii, Morch, Prod. Moll. Gronl. 19, 1857. 



Prime Cat. Corb. 17, 1863. Q-reenland. 



41. P. subtruncatum, Malm. Sweden. 



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

 MuscuUum 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, Linslej (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. 7—9, 1852. 

 Pisidium grande, Whittemore, in litt., 1855. 

 Pisidium palustre, Lewis, in litt. 

 3Iusculium 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 Amerioa. 



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

 1851. 



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

 452, 1858. 



