SE 
15... PISIDIUM PUNCTIFERUM, Guppy. 
Ann. mag. nat. hist. 3d series XIX, 
Trinidad. (Ex auctore.) 
South America. 
16. PISIDIUM TITICACENSE, Prime. 
Lake Titicaca, Peru. (Collected in 1876 by the Agassis expe- 
dition. Undescribed). 
17... PISIDIUM CHILENSE, Deshayes. 
Smithson. Monogr. 
Valparaiso. 
a. Pisidium angulatum, Prime. Coquimbo, Chile. 
Europe. 
18. PISIDIUM AMNICUM, Jenyns. 
Baudon Pisid. 1857. 
a.… Agen, France. 
