Four examples of Limnaea stagnalis L., from marshes in the Aral district which are salt for several months in the year, illustrating variation produced by changes in the environment.
Figure 4.a Dry old stillwater channel near the River Crnojevića (September, 2012), sampling site of Bithynia montenegrina (Wohlberedt, 1901) b Lymnaea raphidia (Bourguignat, 1860) from Božaj, Montenegro.