40 PALUDINIDA. 
23. Bythinia leachi. 
Turbo Leachi, Sheppard, Trans. Lin. Soc. XIV, 1823, England; = Paludina 
wventricosa, Gray, Med. Repos. 1821 (sine deser.); fide Jef., var. elongata, 
England. 
3 England ; coll. G. Nevill, Esq. 
2 North Italy; ex “Linnea” (as “ B. similis, Zgl. — ventrosa, Gray”). 
subvar. major. 
1 Troitskaja (Siberia) : exc. Dr. H. Dohrn. 
subvar. inflata. 
4 Suchorowskaja (Siberia); ex c. Dr. H. Dohrn. 
var. 
2 Albania; ex “ Linnea” (as “ B. orsinii, Charp.”) 
These are certainly not the species figured by Kiister as 
Paludina orsinti, “ Charp. Ms., from Ascoli” (Central Italy). 
24, Bythinia troscheli. 
Paludina Troschelii, Paasch, Wiegm. Archiv. 1842, Berlin; = Paludina 
similis, Boll, Moll. Mecklend. 
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., Kiister, Conch.—Cab. II, 1852, Ascoli. 
1 Carthagena (Spain) ; coll. G. Nevill, Esq. (4§, 34). 
The above original figure agrees exactly; this specimen 
measures long. 43, diam. (vix) 3 mil., and thus agrees fairly 
with B. bourguignati, Palad., from fPerpignan, the last 
whorl of which, however, is less convex; B. meridionalis, 
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. IT, 1830, Sicily ; var, sinistrorsa, Phil, Zeits, 
Mal. 1844. 
2 Sicily ; ex “ Linnea”. 
5 Italy (?); ex c. Prof. H. Troschel, 
