50 RISSOIDE. 
16. Hydrobia (Bythinella) lanceolata. 
Hydrobia lanceolata, Paladilhe, Rev. and Mag. Zool. 1869, St. Jean de Luz. 
30 Bayonne ; coll. G. Nevill, Esq. 
17. Hydrobia (Bythinella), sp. 
8 Alsace ; ex c. P. Joly, Esq. 
var. (?). 
3 Alsace ; ex c. P. Joly, Esq. 
18. Hydrobia (Bythinella) ligurica. 
Hydrobia Ligurica, Paladilhe, Rev, Mag. Zool. XIX, 1867, Finale (IN. 
Italy]. 
1 Alassio ; coll. G. Nevill, Esq. 
19. Hydrobia (Bythinella) saxatilis. 
Hydrobia saxatilis, Reynies, ms., Dupuy, Moll. Fr. 1851, p. 561, Montauban ; 
fide Paladithe, of “ Lettre & M, Moquin-Tandon, 1843, pl. I, fig. 3. 
6 Cantal ; coll. P. Breviére, Esq. 
var. [ ? dist. sp.] 
7 Bayonne ; coll. G. Nevill and Marquis de Folin. 
Has a smaller aperture, more produced spire, and less obtuse 
apex than the preceding. Dr. Kobelt considers it a species of 
the section Frauenfeldia. 
20. Hydrobia (Bythinella) uzielliana. 
Bythinia Uzielliana, Jssel, Moll, Miss. Persia, 1865, p.19—long. 23, diam. 
1} mil.—hot-water springs at Kerman. 
100 Asupas, Sabestan and Karman (Persia) ; coll, W. T. Blanford, Esq. 
21. Hydrobia (Bythinella) peracuta. 
Hydrobia peracuta, Paladilhe, Rev. Mag. Zool, 1869, “ Lyon? and “ Nyons ” 
[Switzerland ]—long. 3, diam. 14 mil. 
3 Alsace ; exc. P. Joly, Esq. 
var. [? dist. sp.] 
8 Alsace ; ex c. P. Joly, Esq. 
