50 ElSSOID^. 



16. Hydrobia (Bythinella) lanceolata. 



Hydi-obia lauceolata, PaladiUie, Hev. and Mag. Zool. 1S69, St. Jean de Lwz, 

 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. 



Hydi-obia Ligiu-ica, laladilhe, Eev. Mag. Zool. XIX, 1S67, Finale [iV. 

 Itali/']. 



1 Alassio ; coll. G. Nevill, Esq, 



19. Hydrobia (Bythinella) saxatilis. 



Hydrobia saxatilis, Regnies, ms., Bupug, Moll. Fr. 1851, p. 561, 3Iontaiihan ; 

 fide Paladllhe, of" Lettre a 31. Moquin-Tandon, 1843, pi. I, fig. 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 Fraueujeldia. 



20. Hydrobia (Bythinella) uzielliana. 



Bytbinia Uzielliana, Issel, Moll. Miss. Persia, 1865, p. 19 — long. 2\, dium. 

 1\ mil. — hot-water springs at Kerman. 



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



21. Hydrobia (Bythinella) peraeuta. 



Hydrobia peracnta, Paladilhe, Rev. Mag. Zool, 1869, " Zgoii" and " Ngons " 

 [^Switzerland.^ — long. 3, diam. if mil. 



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



var. [? dist. sp.] 

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



