II

A LIST OF THE LAND AND FRESHWATER SHELLS COLLECTED IN SOKOTRA BY MR. AND MRS. THEODORE BENT

By Edgar A. Smith, F.Z.S., Assistant Keeper of Zoology, British Museum.

Previous to the researches of Mr. and Mrs. Bent, only forty-eight land and freshwater molluscs had been recorded from Sokotra. In addition to twenty-three of these species, they were fortunate in obtaining eleven new forms, some of them very remarkable. These have been described and figured by the writer in the 'Journal of Malacology,' vol. vi. pp. 33-38, plate v., figs. 1-9. and in the 'Bulletin of the Liverpool Museum,' vol. ii. No. 1, p. 12. The British Museum is much indebted to Mrs. Bent for the donation of this valuable collection.

A. Terrestrial Species

1. Buliminus Passamaianus 16. Stenogyra insculpta, n. sp.

2. Buliminus Balfouri 17. Stenogyra decipiens, n. sp.

3. Buliminus mirabilis, n. sp. 18. Stenogyra Jessica

4. Buliminus Bentii, n. sp. 19. Stenogyra adonensis

5. Buliminus rotundus, n. sp. 20. Ennea cylindracea, n. sp.

6. Buliminus socotorensis 21. Succinea sp.

7. Buliminus semicastaneus 22. Otopoma Balfouri

8. Buliminus Balfouri 23. Otopoma complanatum

9. Buliminus hadibuensis 24. Otopoma clathratulum

10. Buliminus fragilis 25. Otopoma conicum

11. Buliminus fusiformis 26. Tropidophora socotrana

12. Buliminus acutus, n. sp. 27. Lithidion marmorosum

13. Buliminus innocens, n. sp. 28. Lithidion Bentii, n. sp.

13a. Buliminus Theodoræ, n. sp. 29. Cyclotopsis radiolata

14. Stenogyra socotrana 30. Auricula socotrensis, n. sp.

15. Stenogyra enodis

B. Freshwater Species

31. Melania tuberculata 32. Planorbis sp. 33. Planorbis sp.