PLATE CXI. 



Vol. Page 



1, I, a. Batissa tenebrosa. Shell. . . . JI. 448 



2, 2, a. Velorita cyprinoides. Shell. . . 449 



3, Spbseriuin lacustre. Forbes and Hanley, Brit. 

 Moll.pl. 0, fig. 7 ,,449 



3, , 3, b. Sphaeriuni corneum. Shell. . . 449 



4. Musculium amuicum. Forbes and Hanley, Brit. 

 Moll.pl. 0, fig. S f 451 



4, a, 4, b. Musculium amnicum. Shell. . . ,, 45 1 



5. Cyrenoida Dupontia. Desk. May. dc Zool 1835, 



Cl V. pi 70, fig. *. . . i} 453 



5, a, 5, b. Cyrenoida Dupontia. Shell. . . 453 



0. Cardium edule. Original. A. A. 454 



f ', ", 0, b. Cardium costatum. Shell. 454 



