EXPLANATION OF PLATES 
MOLLUSCA AND SHELLS 
PLATE. 
Fig. 1. LimAx COLUMBIANUS, side view; 1a, mottled variety; 
10, face; 1c, calcareous rudiment.—p. 3. 
Fig. 2. ARION'FOLIOLATUS, side view; 2 a, papille, enlarged ; 20, 
dark variety.—p. 2. 
Fig. 3. LIMAX OLIVACEUS, side view; 8 a, the animal, contracted ; 
3 b, transverse section.—p. 4. 
. Fig. 4. LIMAX FULIGINOSUS, the animal, crawling; 4 a, transverse 
section.—p. 5. 
Fig. 5. VAGINULUS TAUNAISI, the animal, extended; 5 a, the 
head; 50, portion of the foot.—p. 5. 
Fig. 6. ATHORACOPHORUS BITENTACULATUS, animal, extended ; 6 a, 
view of the back ; 6 b, mode of coiling itself; 6 c, the head.—p. 2. 
Fig. 7. VITRINA RUIVENSIS, the animal, extended; 7 a, the ani- 
mal, retracted in the shell; 7 b, back of the shell; 7 c, aperture of 
the shell; 7 d, profile of the shell.—p. 6. 
Fig. 8. VITRINA NITIDA, top of shell, with the animal, 8 a, base 
of the shell; 8 2, profile of the shell.—p. 9. 
Fig. 9. VITRINA CAPERATA, front view of the shell; 9 a, view 
from above.—p. 10. 
Fig. 10. VITRINA TENELLA, the front; 10 a, the back; 10 5, the 
base of the shell, —all enlarged; 10 c, natural size.—p. 11. 
Fig. ll. VrrRINA ROBUSTA, front view of the shell; 11a, back 
of the shell; 11 b, base of the shell.—p. 10. 
Fig. 12. VITRINA MARCIDA, dorsal view of the shell, with th 
animal extended; 12a, front of the animal; 120, base of the 
shell; 12 c, edge of the shell.—p. 7. 
Fig. 18. VITRINA FURVA, shell, with the animal as in crawling. 
—p. 12. 
PLATE X 
Fig. 14. SUCCINEA ROTUNDATA, the aperture, enlarged, 14 a, 
the spire, enlarged; 14 b, profile of the shell, magnified; 14 c, 
natural size; 14 d, shell, with the animal, 14 e, front of the 
animal.—p. 15. 
Fig. 15. SUCCINEA CEPULLA, the aperture, magnified, 15 a, pro- 
file of the shell, magnified ; 15 b, natural size.—p. 16. 
Fig. 16. SUCCINEA PUTAMEN, animal, with the shell, seen late- 
rally; 16 a, the same, seen from above; 160, aperture of the 
shell; 16 c, back of shell. —p. 13. 
Fig. 17. SUCCINEA VESICALIS, view of the aperture; 17 a, pro- 
file view of the shell. —p. 21. 
Fig. 18. SUCCINEA LUMBALIS, front, and 18 a, the profile view of 
the shell, enlarged, 18 b, natural size.—p. 17. 
Fig. 19. SUCCINEA HUMEROSA, front view of the shell; 19 a, late- 
ral view of the shell.—p. 18. 
Fig. 20. SUCCINEA CANELLA, aperture, and 20 a, profile of the 
shell, enlarged; 20 b, natural size.—p. 27. 
Fig. 21. SUCCINEA CROCATA, front of the shell; 21 a, profile of 
the shell; 21 b, the animal, with the shell.—p. 28. 
Fig. 22. SUCCINEA MAGELLANICA, the front, and 22 a, profile of 
the shell, enlarged; 220, the animal, with the shell, enlarged; 
22 c, natural size.—p. 24. 
Fig. 28. SUCCINEA MANUANA, the aperture, and 23 a, the pro- 
file view of the shell, enlarged, 23 b, natural size.—p. 25. 
Fig. 24. SUCCINEA MODESTA, the aperture; 24 a, profile of the 
shell, and 24 b, side of the shell with the animal, twice the natu- 
ral size; 24 c, natural size.—p. 23. 
Fig. 25. SUCCINEA VENUSTA, front of the shell, enlarged; 25 a, 
lateral view of the shell, enlarged, 25 b, natural size.—p. 22. 
Fig. 26. SUCCINEA INFUNDIBULIFORMIS, the aperture, and 26 a, 
profile view of the shell, enlarged; 26 6, natural size; 26 c, ani- 
mal, with the shell; 26 d, head of the animal.—p. 19. 
Fig. 27. SUCCINEA PUDORINA, the aperture of the shell; 27 a, 
the profile view of the shell; 27 b, the animal, bearing the shell. 
—p. 21. 
Fig. 28. SUCCINEA PROCERA, aperture of the shell, 28 a, profile 
view of the shell; 28 b, the animal, bearing the shell.—p. 20. 
Fig. 29. SUCCINEA RUSTICANA, front of the shell; 29 a, side of 
the shell, with the animal; 29 4, profile of the shell.—p. 28. 
Fig. 30. SUCCINEA CADUCA, the ventral, and 30 a, the lateral view 
of the shell, enlarged ; 30 5, natural size.—p. 26. 
Fig. 31. SUCCINEA EXPLANATA, the front, 31 a, the back, and 
31 b, the edge of the shell, enlarged; 31 c, natural size.—p. 13. 
