JAPANESE MOLLUSKS, CORALLIOPHILID^. 45 



cited above belong to one species. The numerous specimens col- 

 lected by Mr. Stearns show both of Lischkes' forms and many inter- 

 mediate between them, as well as other mutations. When com- 

 pletely adult there are a few widely spaced denticles within the lip, 

 as in P. luteostoma, from which this form differs mainly in the black- 

 ish substance of the shell, which is conspicuously shown upon the 

 eroded tubercles and within the aperture. Connecting specimens 

 between this form and luteostoma probably occur. 



Purpura lapillus Lin. Ann. Mag., 1875, p. 424. 



Hakodate (Stearns). 



Jopas sertum Brug. Japan (Dkr. ; Stearns). 



Rioinula ricinus Linne. Hachijoshima (Dkr.),- Nagasaki (Lischke). 



Eicinula morus Lam. Japan (Stearns). 



Sistrum undatum Chemn. {R.Jiscellum Reeve). Nagasaki (Lischke) ; Deshima 

 (Nuhn). 



Sistrum tuberculatum Blainr. Ann. Mag., 1875, p. 424. 



Shores of Toba and Oshima (St. John). 

 Sistrum musiva Kiener. Icon. Coq. Viv. Purpura, pL 9, f. 22. 

 Japan (Dkr.). 



Sistrum asperum Lam. C. Icon., sp. 13 {Ridnula). 

 Japan (Dkr.). 



Sistrum sidereum Reeve. C. Icon., sp. 14 {Ricinula). 

 Takano-Shima (Ad.). 



CORALLIOPHILID^. 



Coralliophila monodonta Q. &, G. Astrol., pi. .37, f. 9-11. 



Hakodate Bay (Schrenck). 

 Coralliophila costularis Blainv. C. Icon., f. 6.3 (Purpura). 



Japan (Dkr.). 



Coralliophila jeffreysi Smith. P. Z. S., 1879, p. 213, pi. 20, f. 48. 



Inland Sea, between Shikoku and Nippon, 22 fms. (St. John). 



Coralliophila stearnsii n. sp. PI. II, fig. 12. 



Shell pure white, resembling in form C. inflata Dkr. Whorls 6, 

 convex, sculptured with longitudinal folds, 11 on penult, whorl, and 

 strong spiral cords passing over but lower on the folds, alternating 

 in size, densely scaly, deeply separated, 7 or 8 on penult, whorl. 



