Plate I. 



Fig. 1. Solilnla strigosa Gould, a. Sui-face enlarged to show punctured lines. 

 Ötake. P. 22 



Solidula clathrata Yok. Shitö P. 28. 



L3uçotiua gigantea Dkr. Ötake. P. 28. 



Tornatina exilis Dkr. a. Apical view. Otake. P. 24. 



Tornatina longispirata Yam. Shitö. P. 24. 



Retusa globosa Y'^ain. a. Apical view. Otake. P. 2-5. 



Retusa trun^ata Yam. a. Apical view. Otake. P. 25. 



Volvnla augustata Ad. var. a. Apical view. Otake. P. 26. 



Volvula acutaeformis Y'^ok. Shito. P. 26. 



Cylichna ransasliiensis Tok. Ötake. P. 27. 



Philiue sealpta Ad. Shisui. P. 27. 



Philine sealpta Ad. (,?) Ivioroshi. P. 28. 



Philiue pygmaea Yok. Ötake. P 28. 



Bulla multiarata Yok. 14a. Surface enlarged. Shito. P. 29. 



Bulla ovula Sow. Shisui. P. 29. 

 Fig. 16, 17. Riugicula musashinoensis Y''ok. 16. Normal form. Shitö. 17. Smooth 



form. Ötake. P. 80. 

 Fig. 18. Terebra gotoensis Smith. 18a. Surface enlarged. Otake. P. 31. 

 Fig. 19. Terebra heileyi Piis. a. Upper whorls enlarged, b. Lower wliorls enlarged. 



Ötake. P. 31. 

 Fig. 20. Terebra cliibana Yok. Ötake. P. 32. 

 Fig. 21. Terebra smithi Yok. Ötake. P. 33. 



Fig. 22. Terebra quadriarata Yok. 22a. Whorls enlarged. Shitö. P. 34. 

 Fig; 28. Terebra latisulcata Y'ok. a. Surface enlarged. Shitö. P. 34. 

 Fig. 24. Terebra suavidica Y'ok. Shisui. P. 35. 

 Fig. 2-5. Parviterebia raritans Y^ok. Ötake. P. 36. 

 Fig. 26. Pleurotoma vertebrata Smith, a shows the slit. Shitö. P. 37. 

 Fig. 27, 28. Genotia pseudopannus Yok. 27. Ötake. 28. Yar. semateusis. Shitö. P. 37. 

 Fig. 29. Genotia ogurana Y"ok. a shows the shallow lip-notch. Otaka. P. 38. 

 Fig. 30. Drillia subauriformis Smith, a shows lip-notch. Kamenari. P. 40. 

 Fig. 31, 32. Drillia glabriuseula Y'ok. 3la, 32a show lip-notch. 32. Yar. brevis. Shitö. 



P. 40. 

 Fig. 33. Mangilia ojiensis Tok. a shows lip-notch. Shitö. P. 41. 

 Fig. 34. Mangilia fukuchiana Y'ok. a shows lip-notch. Ötake. P. 42. 

 Fig. 35. Mangilia (Cythara) rugoso-labiata Y''ok. a shows lip-notch. Ötake. 

 Fig 36. Mangilia (Cythara) oyuana Yok. Shisui, P. 43. 

 Fig. 37. Bela rugnlata Tros. var. schneideri Harm. Ötake. P. 44. 

 Fig. 33. Bela recticostulata Y''ok. a shows lip-notch. Shitö. P. 44. 



