52 RISSOIDE. 
30. Hydrobia (Bythinella) etrusca. 
Hydrobia Etrusca, Paladilhe, Rev. Mag. Zool. XTX, 1867, nr. Florence— 
long. 2%, diam. 14 mil, 
1 Alassio [Liguria] ; coll, G. Nevill, Esq. 
31. Hydrobia (Bythinella) servainiana. 
Hydrobia Servainiana, Bourguiguat ms., Paladilhe, Ann, Malae. 1870, St. 
Jean de Luz, Dep. de? Herault—long. 8, diam. 13 mil. 
8 Hamman Sidi Djabellay (Algeria); ex c. P. Joly, Esq. (as “H. 
servainiana’’). 
32. Hydrobia (Bythinella) marginata. 
Paludina marginata, Michaud, Compl. Drap. 1831, Draguignan [Dept. 
Var]; sect. Belgrandia, 
1 Dep. Ariége; exc. P. Joly, Esq. 
33. Hydrobia (Bythinella) nana. 
Paludina nana, Terver, Cat. Moll. N. Africa 1839, Bougie Guelma; sect. 
Frauenfeldia, fide Kobelt. 
25 Algiers; coll. P. Joly, Esq. 
84. Hydrobia (Bythinella) glabra. 
Hydrobia glabra, Tryon, Amer. Journ. Conch, I, 1865, Bolivia, “ex ec, New- 
comb.” 
30 Bolivia (typical) ; coll. Prof. W. Newcomb and W. A. Brown, Esq. 
35. Hydrobia (Bythinella) miliacea. 
Hydrobia (Belgrandia) miliacea, G, Nevill, Journ, Asiat, Soc. Bengal, 1880, 
Pt. Canning, and op. cit. 1881, pl. VIL, fig. 7 ; sect. Belgrandia. 
100 Port Canning, Lower Bengal [type]; coll. G. Nevill, Esq., and Colonel 
G. B. Mainwaring. 
subvar. gibbosula, nov. 
1 Port Canning; coll. Dr. F. Stoliczka. 
subvar. subangulata, nov. 
10 Port Canning; coll. G. Nevill, Esq. 
4 Chilka Lake; coll. H. F. Blanford, Esq. 
