40 PALTJDINIDJJ. 



23. Bythinia leachi. 



Turbo Leachi, Sheppard, Trans. Lin. Soc. XIV, 1823, England; = Paludina 

 ventricosa, Gray, Med. Sepos. 1821 (sine descr.); fide Jef., var. elongata, 

 England. 



3 England ; coll. G. Nevill, Esq. 



2 North Italy; ex "Linnsea" (as " B. similis, Zgl. = ventrosa, Gray"). 



subvar. major. 



1 Troitskaja (Siberia) : ex c. Dr. H. Dohrn. 



subvar. inflata. 



4 Suchorowskaja (Siberia) ; ex c. Dr. H. Dohrn. 



var. 



2 Albania ; ex " Linnsea" (as " B. orsinii, Charp.") 



These are certainly not the species figured by Kuster as 

 Paludina orsinii, " Charp. Ms., from Ascoli " (Central Italy). 



24. Bythinia troscheli. 



Paludina Troschelii, PaascTi, Wiegm. Archiv. 1842, Berlin ; = Paludina 

 similis, Boll, Moll. MecTclenb. 



1 Aix-les-Bains ; coll. G. Nevill, Esq. 

 7 Kashmir ; coll. Dr. F. Stoliczka. 



The latter specimens are all decollate ; the whorls are even 

 more convexly rounded than usual. 



25. Bythinia orsinii. 



Paludina Orsinii, Charpentier ms., Kuster, Conch. Cab. II, 1852, Ascoli. 



1 Carthagena (Spain) j coll. G. Nevill, Esq. (4|, 3J). 



The above original figure agrees exactly ; this specimen 

 measures long. 4|, diam. (vix) 3 mil., and thus agrees fairly 

 with J5. bourguignatij Palad., from Perpignan, the last 

 whorl of which, however, is less convex; B. mer'idionalis, 

 Frauenfeld, from Spain, is also somewhat like, but it has the 

 spire less produced, the apex more obtuse, and the aperture 

 more everted. 



26. Bythinia rubens. 



Paludina rubens, Menke, Syn. II, 1830, Sicily ; var. sinistrorsa, Phil., Zeits. 

 Mai. 1844. 



2 Sicily ', ex *' Linnsea". 



5 Italy (?) ; ex c. Prof. H. Troschel. 



