160 SUPPLEMENT. 



resemblance of the shell, when> floating on the surface of the 

 water, to " une petite bulle d'air transparente." 



P. 233. B. ACUTUS. E. Near Nykjobing, Jutland; pro- 

 bably introduced (Morch); Malta (Issel); Alexandria (E. v. 

 Martens). 



P. 235. B. MONTANTJS. E. Ural Mountains (Middendorff) ; 

 Sweden (Zetterstedt) ; Belgium (Colbeau) ; S. Prance (De 

 Brebisson) ; Catalonia (Graells) ; Tuscany (Pecchioli, /. Gen- 

 tiluomo). 



P. 237. B. OBSCURTJS. E. Algeria (Bourguignat). 



P. 243. PUPA SECALE. E. Capri I. (Philippi); Sicily (Cal- 

 cara) ; Madeira (Watson). 



P. 245. P. RINGENS. Banff (Edward); Dingwall (Bucha- 

 nan White) ; Cheshire (Webster). L. Pfeiffer does not seem 

 to have known the synonymy of this species. 



P. 246. P. UMSILICATA. E. Madeira (K. T. Lowe and 

 others) ; S. Abyssinia (Henglin, /. E. v. Martens). P. an- 

 conostoma, Lowe. 



P. 249. P. EMARGINATA. E. U.S., as P. badia of Prof. 

 Adams. 



P. 253. VERTIGO ANTIYERTIGO. E. Kiev, Eussia (Jelski) ; 

 Sicily (Calcara and others). 



P. 255. Y. MOULINSIANA. E. Cambridge (Dewick). E. 

 Eonneby, Sweden (Westerlund, as V. modesta afterwards V. 

 Lilleborgi}', Lake Fuurso, Denmark (Morch) ; Frankfort (Hey- 

 nemann, as V. ventrosa) ; Berne (Lischke); Tirol (Gredler) ; 

 Sicily (Benoit). 



P. 257. Y. PYGIOSA. E. Lapland (Nylander). 



P. 259. V. ALPESTRIS. E. Amoorland (Schrenck) ; Swe- 

 den (Lindstrb'm and others); Bonn (Lischke) Tirol (Gredler). 



P. 261. Y. STJBSTRIATA. Banff (Edward) ; Perth (Bucha- 

 nan White); Went y ale, Yorkshire (Ashford). E. Denmark 

 (Feddersen and others), and various parts of Germany. 



P. 263. y. PUSILLA. E. Lapland Sicily. 



P. 265. y. ANGUSTIOR. Milford, Yorkshire (Blackhouse). 

 E. Eussia, Sweden, Denmark, Belgium, N. Italy, Transyl- 

 vania, and Dalmatia. V. vertigo, Issel. 



P. 268. y. EDENTULA. E. Dalmatia (Brusina) ; Madeira 



