Plate III. 



Fig. 1. Chrysodomus scbrencki Yok. a. Front-view. b. Back-view. Koshiba. p. 51. 

 Fig. 2. Tropbon subclavatns Yok. Enlarged, a. Front-view. b. Back-view. 



Sbimo-Miyata. p. 60. 

 Figs. 3, 4. Siphonalia stearnsii Fils, a. Front-view. b. Back-view. Naganuma. p. 54. 

 Fig. 5. Nassa (Hima) japonica. Enlarged, a. Front-view. b. Back-view. Yokosnka. 



p. 56. 

 Fig. 6. Nassa (Hima) festiva. Enlarged, a. Front-view. b. Back-view. Kami- 



Miyata. p. 57. 

 Fig. 7. Colmnbella (Atilia) burcbardi Dkr. a. Front-view. b. Back-view. Yoko- 



suka. p. 59. 

 Figs. 8, 9. Sipbonalia spadicea. a. Front-view. 1). Back-view. Sbimo-Miyata. p. 53. 

 Fig. 10. „ „ „ „ „ „ Otsu. 



Fig. 11. ,, „ ,, „ ,, ,, Motowada. 



Fig. 12. Volutbarpa perryi Jay. Front-view. Sbimo-Miyata. p. 55. 

 Fig. 13. Tropbon nipponicus Yok. Enlarged, a. Front-view. b. Back-view. Kosbiba. 

 Fig. 14. ,, ,. ,, Front-view. Teramae. p. 61. 



Fig. 15. Columbella (Mitrella) dunkeri Tr. a. Front-view. b. Back-view. Yoko- 



suka. p. 59. 

 Fig. 16. Purpura alveolata Eve. Young specimen, a. Front-view. b. Back-view. 



Naganuma. p. 64. 

 Fig. 17. Tropbon muricatoides Yok. Enlarged, a. Front-view. b. Back-view. 



Kami-Miyata. p. 61. 

 Fig. 18. Nassa (Niotba) livescens Pbil. a. Front-view. b. Back-view. Sbimo- 

 Miyata. p. 58. 

 Fig. 19. Triton (Priene) oregononsis Redf. Young specimen. Front-view. Kosbiba. 



p. 64. 

 Fig. 20. „ ,, ,, ,, Full-grown spec. a. Front-view b. Back- 



view. Kosbiba. 

 Fig. 21. Tropbon inermis Sow. Form with many varices and distinct spiral 



threads. Front-view. Koshiba. p. 62. 

 Fig. 22. „ ,, „ Broad form with a few varices and obsolete spiral 



threads, a. Front-view. b. Baek-view. Koshiba. 

 Fig. 23. ,, „ ,-, Form intermediate in breadth. Varices not many 



and spiral threads indistinct. Koshiba. 

 Fig. 24. ,, „ ,, Slender form. Spiral threads indistinct. Koshiba. 



Fig. 25. ,, „ ,, Varices many, spiral threads very distinct. 



Koshiba. 

 Fig. 26. ,, ,, „ Broad form. Varices prominent, but not many. 



Spiral threads indistinct. Koshiba. p. 62. 

 Fig. 27. Purpura luteostoma Chem. a. Front-view. b. Back-view. Otsu. p. 63. 





