52 RISSOID^. 



30. Hydrobia (Bythinella) etruaca. 



Hydrobia Etrusca, Paladilhe, Mev. Mag. Zool. XIX, 1867, nr. Florence — 

 long. 2z, diam. 1\ mil, 



1 Alassio [Ligui-ia] ; coll, G. Nevill, Esq. 



31. Hydrobia (Bythinella) servainiana. 



Hydrobia Servainiana, Bourguiguat ms., PaladilJie, Ann. Malac. 1870, St. 

 Jean de Luz, Dep. de VHerault — long. 3, diam. if mil. 



8 Hamman Sidi Djabellay (Algeria) ; ex c. P. Joly, Esq. (as " H. 

 servainiana"). 



32. Hydrobia (Bythinella) marginata. 



Paludina marginata, Michaud, Comjpl. Drajp. 1831, Draguignan [^Dept. 

 Var'] ; sect. Belgrandia, 



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



33. Hydrobia (Bythinella) nana. 



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

 Frauenfeldia, Jide Kohelt. 



25 Algiers ; coll. P. Joly, Esq. 



34. Hydrobia (Bythinella) glabra. 



Hydrobia glabra, Tryon, Amer. Journ. Condi, 1, 1865, Bolivia, " ex c. 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, 

 Ft. 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. Main waring. 



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. 



