PLATE XVIII. 



Q> 



+ 



7. a 



9 a. 



l.Xeredo megotara; 2. 2, pallets ofth.e sa_uie . 



3.4 n avalis . 



.">. tfontacuta ferrugiiiea ; 5,a.inside; .">.l>.\;u ietj 



6. bidentata ; 6, a, inside. 



S . substriata ; S,a,in.side. 



7. Turtonia miniita ; 7, a , inside . 



9,ESellia suliorbicularis ; 9.a.inside; 9.b variety. 



