Art. 5.— Matajiro Yokoyama : 



2. Conus siehokli Reeve. 



3. Pleurotoma hamahirana Pilsbry. 



4. Mangilia rohiisticostata Smith. 



5. Admete viridula Fabricius. 



6. Voluta megaspim Sowerby. 



7. Mitra ehenvs Lamarck. 



8. Chrysodoimis pliœniceiis Dali. 



9. Chrysodomus pericochlion Schrenck. 



10. Troplion dathratus Linné. 



11. Priene orcgonensis Redfield. 



12. Natica clausa Broderip et Sowerby. 



13. Leptotliyra amussitata Gould. 



14. Puncturella conica Orbigny. 



15. Acmœa heroldi Dunker var. pygmcca Dunker 



16. Patella pallida Gould. 



17. Dcntalium lücinkaiiß Dunker. 



18. Corbula veniista Gould. 



19. Lucina horcalis Linné. 



20. Cardium modcstum Adams et Reeve. 



21. Aiiomia cijtœum Gray. 



22. Lima goliatli Smith. 



23. Lima smitlvi Sowei'by. 



24. Lima japonica A. Adams. 



25. Pectcn swiftii Bernardi. 



26. Pectcn yessoensis Jay. 



27. Pectcn vesiculosits Dunker. 



28. Pectcn similis Lasky. 



29. Pectcn iircgidaris Sowerby. 



30. Pectcn tujerrimis Müller. 



31. Ostrea gigas Thunberg. 



32. Area hohcltiana Pilsbry. 



33. Area decussata Sowerby. 



34. Area stcarnsii Pilsbry. 



35. Limopsis crenata A. Adams 



36. Lcda ramsayi Smith. 



37. Nucida insignis Gould. 



