52 RISSOID^. 



30. Hydrobia (Bythinella) etrusca. 



Hydi'obia Etrusca, Paladilhe, Eev. Mag. Zool. XIX, 1867, nr, Florence— 

 long. 2J, diam. 1\ mil. 



1 Alassio [Liguria] ; coll, G, Nevill, Esq. 



31. Hydrobia (Bythinella) servainiana. 



Hydrobia Servainiaua, Hourguiguat ms., Paladilhe, Ann, Malao. 1870, St. 

 Jean de Luz, Dep. de I'Herault — long. 3, diam. J| 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 \I)ept. 

 Var'] ; sect. Belgrandia. 



1 Dep. Ariege ; ex c. P. Joly, Esq. 



33. Hydrobia (Bythinella) nana. 



Paludina nana, Terver, Cat. Moll. N. Africa 1839, Bougie ^ Gttelma ; sect. 

 Fraitenfeldia, Jide Eohelt. 



25 Algiers; coll. P. Joly, Esq. 



34. Hydrobia (Bythinella) glabra. 



Hydrobia glabra, Tryori, Amer. Journ. Conch. 1, 1865, Bolivia, "ex e. Xeio- 

 comh." 



30 Bolivia (typical) ; coll. Prof. W. Newcomb and W. A. Brown, Esq. 



35. Hydrobia (Bythinella) miliacea. 



Hydrobia (Belgrandia) miliacea, G. Nevill, Joiirn. Asiat. Soc. Bengal, 1880, 

 Pt. Canning, and op. cit. 1881, pi. VII, 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 Cliilka Lake ; coll. H. F. Blanford, Esq. 



