Art. 1. — M. Yokoyama : 



10. Volvula acutaeformis Yok 

 Family Scaphandridae 



11. Cylichna musashiensis 



Tok. 



Family Philinidae. 



12. Philine scalpta Ad. 



13. Philine pygmaea Yok. 



14. Philine takatensis Yok. 



Family BuUidae 



15. Bulla multiarata Yok. 



16. Bulla ovula Sow. 



Family PdngicuUdae. 



17. Ringicula musashinoensis 



Yok. 



Family Terebridae. 



18. Terebra lischkeana Dkr. 



19. Terebra gotoensis Smith. 



20. Terebra hedleyi Pi Is. 



21. Terebra recticostata Yok. 



22. Terebra chibana Yok. 



23. Terebra smithi Yok. 



24. Terebra quadriarata Yok. 



25. Terebra latisulcata Yok. 



26. Terebra suavidica Yok. 



27. Terebra tsuboiana Yok. 



28. Parviterebra raritans Yok. 

 Family Pleurotomidae. 



29. Pleurotoma vertebrata 



Smith. 



30. Genotia i^seudoi^annus 



Yok. 



31. Genotia og'urana Yok. 



32. Drillia principalis Pils. 



33. Drillia subauriformis 



Smith. 



34. Drillia glabriuscula Yok. 



35. Mangilia deshayesii Dkr. 



36. Mangilia ojiensis Tok. 



37. Mangilia fukuchiana Yok. 



38. Mangilia (Cythara) rugo- 



solabiata Yok. 



39. Mangilia (Cythara) 



oyuana Yok. 



W 



LIVING 



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Central Japan. 



Central and Western Japan. 

 Central Japan. 



Central and Southern Japan. 



Central Japan. 



Central and Western Japan. 

 Western Japan. 

 Western Japan. 



Central Jajian. 



Central Japan. 



Central and Western Japan. 



Northern, Centra', and Western 

 Japan. 



Central and Western Japan. 



Central and Western Japan 

 Central Japan. 



