PLATE CXXVm 



G.-S-Sowtri^.^un", 



1.2.3. PlaxLorbis lacustris. 4.Acliatiaa acicula. 



5 BuluaD.s aculus . 6 . B . Laekauieusis 7. B . obscTJras. 



S,y. Balt-a perversa. 10 . Clausilia la.i in nata. 



ZondoTLPicilisked by John Van 'Vborst:'/3S2 . 



