27... PISIDIUM FERRÆNSE, Morch. 
Cat. Suenson 1857. 
Farroe Islands. (Ex auctore.) 
28... PISIDIUM SEPTENTRIONALE, Prime 
Umea, Lapland. (Undescribed.) 
29. PISIDIUM NOV.-ZEALANDICUM, Prime. 
Ann. N. Y. Lyceum VIII. 
New-Zealand. 
30. PISIDIUM CANARIENSE, Shuttleworth. 
Mittheil. naturf. Gesel. Bern 1852. 
Canaries. (Ex auctore.) 
31... PISIDIUM BENSONI, Prime. 
Pisidium parvulum, Benson. 
India. (Ex auctore.) 
