50 RlSSOID^l. 



16. Hydrobia (Bythinella) lanceolata. 



Hydrobia lanceolata, Paladilhe, Rev. and Mag. ZooL 1869, St. Jean de Lriz. 

 30 Bayonne ; coll. G. Nevill, Esq. 



17. Hydrobia (Bythinella), sp. 

 3 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, 1S67, Finale \_N. 

 * Italy], 



1 Alassio ; coll. Gr. Nevill, Esq. . 



19. Hydrobia (Bythinella) saxatilis. 



Hydrobia saxatilis, Reynies, ms., Dupuy, Moll. Fr. 1851, p. 561, Montauban ; 

 fide Paladilhe, of" Lettre a M. Moquin-Tandon, 1843, pi. I, Jig. 3. 



6 Cantal ; coll. P. Breviere, 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, Issel, Moll. Miss. Persia, 1865, p. 19 long. 2\, diam. 

 1$ mil. hot-water springs at Kerman. 



100 Asupas, Sabestan and Karinan (Persia) ; coll. W. T. Blanford, Esq. 



21. Hydrobia (Bythinella) peracuta. 



Hydrobia peracuta, Paladilhe, Rev. Mag. Zool. 1869, " Lyon" and " Nyons " 

 [Switzerland'] long. 3, diam. 1% mil. 



3 Alsace ; ex c. P. Joly, Esq. 



var. [? dist. sp.] 

 3 Alsace ; ex c. P. Joly, Esq. 



