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BXPLANAT ION: OF 2 PA ie. 
MOLLUSCA AND SHELLS. 
Pie Ack aed: 
Fig. 1. Liwax Cotumpranvs, side view; la, mottled variety; | 
1%, face; 1c, caleareous rudiment.—p. 3. 
Fig. 2. ARION FOLIOLATUS, side view; 2 a, papillee, enlarged; 20, | 
dark variety.—p. 2. | 
Fig. 3. LimAx OLIVACEUS, side view; 3 a, the animal, contracted ; 
3 b, transverse section.—p. 4. 
Fig. 4. Liwax Fruricrosvs, the animal, crawling; 4 a, transverse 
section.—p. 9. 
Fig. 5. Vacinutus Taunaisi, the animal, extended; 5a, the | 
head; 5 8, portion of the foot.—p. 5. | 
Fig. 6. ATHORACOPHORUS BITENTACULATUS, animal, extended; 64, | 
view of the back ; 6 &, mode of coiling itself; 6c, the head.—p. 2. 
Fig. 7. Virrina Rurvensis, the animal, extended ; 7a, the ani- | 
mal, retracted in the shell; 7, back of the shell; 7c, aperture of | 
the shell; 7d, profile of the shell.—p. 6. 
Fig. 8. Virrina nitip, top of shell, with the animal; 8 a, base 
of the shell; 8 2, profile of the shell.—p. 9. 
Fig. 9. Virrina cApEraAtA, front view of the shell; 9a, view | 
from above.—p. 10. 
Fig. 10. Virrtva TENELLA, the front ; 10 a, the back; 10 8, the 
base of the shell,—all enlarged; 10 c, natural size.—p. Lk. 
Fig. 11. Virrma ropusta, front view of the shell; 11 a, back 
of the shell; 11 4, base of the shell.—p. 10. 
Fig. 12. Virrina mArcripA, dorsal view of the shell, with the 
animal extended; 12a, front of the animal; 12 6, base of the 
shell; 12 c, edge of the shell.—p. 7. 
Fig. 13. Virrina FrurvA, shell, with the animal as in crawling. 
—p. 12. 
Ph ATE. £2; 
Fig. 14. Succryea rorunpatA, the aperture, enlarged; 14 a, 
the spire, enlarged; 14 , profile of the shell, magnified; 14 ¢, 
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 4, natural size—p. 16. 
Fig. 16. SucctnEA PUTAMEN, animal, with the shell, seen late- 
rally; 16 a, the same, seen from above; 16, aperture of the 
shell; 16 ¢, 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. Succinza LuMBALIS, front, and 18 a, the profile view of 
the shell, enlarged; 18 4, natural size.—p. 17. 
Fig. 19. SuccinzA HUMEROSA, front view of the shell; 19 a, late- 
ral view of the shell.—p. 18. 
Fig. 20. SuccinzA CANELLA, aperture, and 20 a, profile of the 
shell, enlarged; 20 4, natural size.—p. 27. 
Fig. 21. Succrnza crocara, front of the shell; 21 a, profile of 
the shell; 21, the animal, with the shell.—p. 28. 
Fig. 22. SuccingEA MAGELLANICA, the front, and 22 a, profile of 
the shell, enlarged; 226, the animal, with the shell, enlarged ; 
p. 24. 
Fig. 23. SuccrnzA Manvana, the aperture, and 23 a, the pro- 
22 c, natural size. 
file view of the shell, enlarged; 23 6, natural size.—p. 29. 
Fig. 24. SuccinzA MoprsTA, the aperture ; 24 a, profile of the 
shell, and 24 4, side of the shell with the animal, twice the natu- 
ral size; 24 ¢, natural size.—p. 23. 
Fig. 25. Succrvea venustA, front of the shell, enlarged; 25 a, 
lateral view of the shell, enlarged; 25 0, natural size.—p. 22. 
Fig. 26. SuccinEA INFUNDIBULIFoRMIS, the aperture, and 26a, 
profile view of the shell, enlarged ; 26 b, natural size; 26 ¢, ani- 
mal, with the shell; 26d, head of the animal.—p. 19. 
Fig. 27. SuccinEA puporINA, the aperture of the shell; 27a, 
the profile view of the shell; 27 4, the animal, bearing the shell. 
—p. 21. 
Fig. 28. Succrnea procera, aperture of the shell; 28 a, profile 
view of the shell; 28 4, the animal, bearing the shell.—p. 20. 
Fig. 29. Succrnea rusticaNA, front of the shell; 29 a, side of 
| the shell, with the animal; 29 4, profile of the shell—p. 28. 
Fig. 30. Succinga cApuUCA, the ventral, and 30 a, the lateral view 
of the shell, enlarged; 30 4, natural size.—p. 26. 
Fig. 81. Succiyza EXPLANATA, the front; 3la, the back, and 
31d, the edye of the shell, enlarged; 31 ¢, natural size—p. 15. 
