ADDENDA. 
(REFERENCES TO PLATES XXVI-XXX.l 
Note.— The printing of the text of the Gasteropeda before the completion of Plates XXVI-XXX, has necessitated the 
following additional references : 
Page 14, line 19, add PLATE XXIX, FIG. 8. 
Page 16, line 7, add PLATE XXVIII, FIG. 20. 
Page 27, line 19, add PLATE XXVIII, FIG. 16. 
Page 33, line 17, add PLATE XXVIII, FIG. 17. 
Page 40, line 2, add PLATE XXVIII, FIG. 5 ; line 22, add PLATE XXVIII, FIG. 4. 
Page 43, line 20, add PLATE XXVIII, FIGS. 1-3. 
Page 44, line 2, add PLATE XXVIII, FIG. 8. 
Page 45, line 2, add PLATE XXVIII, FIGS. 6, 7, 7 a. 
Page 47, line 2, add PLATE XXVIII, FIG. 15. 
Page 51, line 7, add PLATE XXVIII, FIGS. 18, 19. 
Page 55, line 6, add PLATE XXVII, FIGS. 1-4; PLATE XXIX, FIG. 7. 
Page 56, line 28, after PLATE XXVII, add FIG. 8. 
Page 62, line 11, add PLATE XXVII, FIGS. 5, 6. 
Page 64, line 3, add PLATE XXX, FIGS. 26, 27. 
Page 67, line 2, add PLATE XXX, FIGS. 10, 11, 23, 124. 
Page 69, line 2, add PLATE XXX, FIGS. 8, 9t 
Page 73, line 18, for XXVIII read XXX, FIGS. 15-17. 
Page 74, lines 17, 18, for plate 28 read plate 30. 
Page 76, line 8, add PLATE XXX, FIG. 2. 
Page 79, line 2, add PLATE XXX, FIG. 13. 
Page 80, line 12, add PLATE XXX, FIG. 1. 
Page 81, line 19, add PLATE XXX, FIG. 3. 
Page 85, line 8, for FIG. 19 read FIGS. 4, 19. 
Page 86, line 2, for FIG. 18 read FIGS. 12, 18. 
Page 87, line 2, for FIG. 25 read FIGS. 5, 25; line 20, for FIGS. 20, 21 read FIGS. 6, 20, 21, 22. 
Page 92, line 17, for PLATE XXVIII read PLATE XXX. 
Page 93, line 8, add PLATE XXX, FIG. 28. 
Page 95, line 14, add PLATE XXVI, FIG. 1. 
Page 100, line 3, add PLATE XXVI, FIGS. 10-12. 
Page 106, line 6, add PLATE XXVI, FIG. 13. 
Page 110, line 17, add PLATE XXVI, FIG. 24. 
CORRIGENDA. 
Page 3, line 26, add PLATE II, FIGS. 30, 31. 
Page 17, line 18, dele “and P. dumosum line 19, should refer only to plate 7. 
Page 21, line 7; page 22, lines 3, 22; page 23, lines 1, 12, 21, 27, 30; page 24, lines 1, 20, 27; page 25, 
lines 15, 18; page 26, lines 7, 19; page 27, lines 11, 18; page 28, line 16 ; page 29, lines 7, 12, 17, 21, 
25 ; page 31, line 3 ; page 35, line 23; page 36, line 27 ; page 38, lines 4, 21; page 39, line 21; page 40, 
lines 1, 21 ; page 41, lines 7, 14, 24; page 42, lines 13, 19; page 43, lines 10, 14; page 44, lines 1, 18 ; 
page 46, lines 1, 23; page 49, line 5; page 50, lines 9, 17, 35; page 51, lines 1, 6; page 52, line 18; 
page 53, line 4, for the terminal a or a, in specific names, read um or dm. 
