EXPLANATION OF PLATES. 341 



PLATE V. 



Figure 1. Avion ater, showing the tentacles, eyes, shield, position of 

 the respiratory opening, and slime-gland at the tail. 

 2. Same at rest. 



3. Geomalacus maculosus (from Brit. Moll. pi. F.F.F*. f. 5). 



4. Limax maximus, showing the position of the respiratory 



opening. 5. Shell or Limacella. 



6. Testacetta Haliotidea, showing the labial palps (below the 



tentacles) and the position of the shell. 7. Shell. 8. Egg. 



PLATE VI. 



Figure 1. Succinea putris. 2. Shell. 

 3. Vitrina pettucida. 4. Shell. 



5. Zonites cellaring. 6. Shell. 



7. Helix aspersa. 8. Shell. 



PLATE VII. 



Figure 1. Bulimus acutus. 2. Shell of var. inflata. 



3. Pupa umbilicata. 4. Shell. 5. Natural size. 



6. Vertigo pygmcea, showing the two tentacles. 7. Shell. 



8. Natural size. 



9. Balia perversa. 10. Shell. 11. Natural size. 

 12. Clausilia laminata. 13. Shell. 14. Clausilium. 

 15. Gochlicopa lubrica. 16. Shell. 17. Natural size. 

 18. Achatina acicula. 19. Head and tentacles. 20. Shell. 



21. Natural size. 



PLATE VIII. 



Figure 1. Carychium minimum, showing the position of the eyes. 



2. Shell. 3. Natural size. 

 4. Cyclostoma elegans, showing the snout and position of the 



eyes. 5. Shell. 6. Operculum. 

 7. Acme lineata, showing the position of the tentacles and eyes. 



8, 9. Shell. 10. Natural size. 11. Operculum magnified. 



THE END. 



C 



