46 JAPANESE MOLLUSK8, TRITONID^E. 



Aperture ovate, smooth within ; umbilicus small. Alt. 18, diam. 

 12 mm. 

 Japan (Stearns). 



Leptoconchus peronii Lam. (Striatus Riipp.). Kino-o-Shima (Ad.). 

 Leptoconchus schrenckii Lischke. J. M. < '.. II, p. 45, pi. 4, f. 9, 10. 



Nagasaki (Lischke). 



Leptoconchus rostratus A. Ad. Dkr., Index, p. 45, pi. 6, f. 20, 21. 



Kino-o-Shima, on Madrepores (Ad.) ; Bay of Yedo (Lischke). 

 Bulbus rapa Linn6. (Rapa papyracea Lam., of authors). Japan (Dkr.). 



( Tcenioglosaa). 

 TRITONID2E. 



Tritonium tritonis L. Ohosaka (Lischke). 

 Tritonium nodiferum Lamarck. 



See next species, with which this is united by Tryon, Dunker and 

 others. 

 Tritonium sauliae Reeve. Lischke, J. M. C., I, p. 45 ; II, p. 33, pi. 1, 2. 



Inland Sea, Sagami (Stearns) ; Yedo, Nagasaki (Lischke) ; Tati- 

 yama, Tsu-Saki, Takano-Shima, Bay of Yedo (A. Ad.). 



Tritonium (Simpulum) costatus (Born). Challenger Oastrop, 1873-6, XV, p. 390 

 (Sidney). Syn. T. (Simpulum) olearium Auct. Tryon, Man. Vol. Ill, p. 11, pi. 

 Ill, f. 19. 



Yedo, Nagasaki (Lischke) ; Tatiyama (A. Ad.) ; all along the 

 coast from Tokyo to Ojima (Stearns). 

 Tritonium pileare L. C. Icon., f. 23. 



Japan (Stearns; Dkr.). 

 Tritonium aquatile Reeve. C. Icon., f. 24. 



Nagasaki (Lischke). 

 Tritonium clandestinum (Cheinn.) Lam. C. Icon., f. 13. 



Japan (Dkr.). 

 Tritonium labiosum Wood. C. Icon., f. 52. 



Uraga (A. Ad.). 



Tritonium dorsuosum A. Adams. Ibid, 420. 



Tatiyama (Adams). 

 Tritonium lotorium Linne. Japan (Dkr.). 

 Tritonium dunkeri Lischke. Lischke, J. M. C., I, p. 49, pi. 3, f. 1, 2. 



Japan (Stearns) ; Nagasaki (Lischke). 



