JAPANESE MOLLUSKS, CERITHIOPSID^E. 57 



Bittium scalatum Dkr. Index, p. 108. 



Japan (Dkr.). 

 Bittium oosimense Watson. Challenger Gastrop. XV, p. 548, pi. XXXIX, f. 1. 



Ooshima (Chall.). Must be somewhat like the preceding. 



Potamides (Telescopium) telesoopium Linne. Japan (Stearns, one poor specimen). 

 Potamides (Tympanotonos) fluviatilis P. & M. Nagasaki (Lischke) ; Japan 

 (Stearns). 



Potamides (Batillaria) zonalis Brug. Lischke., J. M. C., I, pi. 6, f. 15, 16. 



Tokyo Harbor (Stearns); Ooshima (St. John); Nagasaki (Lischke); 

 Tokohama (Martens). 



The following forms are closely allied. 



Potamides (Batillaria) cumingi Crosse. Lampania cumingi Crosse, J. de C., 

 1862, p. 54, pi. 1, f. 10, 11 ; J. M. C., I, pi. 6, f. 11-14. 



Tokyo Harbor ; Banda, Boshiu (Stearns) ; Hakodate (Schrenck) 

 Potamides (Batillaria) multiformis Lischke. J. M. C., I, pi. 6, f. 1-10. 



Tokyo Harbor (Stearns). 



The specimens correspond best with Lischke's figs. 7, 8, but are 

 white-banded at suture. 

 Potamides (Batillaria) aterrima Dkr. Index, p. 109, pi. 5, f. 7, 8. 



Japan (Dkr.). Hardly distinct from the preceding. In fact all 

 the above forms of the P. zonalis group should probably be consid- 

 ered varieties of that species. Mr. R. B. Newton has shown that 

 Batillaria Bens, should replace Lampania Gray as a subgeneric 

 name for these forms. 



CERITHIOPSIDJE. 



CeritMopsis subreticulata Dkr. Moll. Jap., p. 9, pi. 2, f. 10. 

 Deshitna (Dkr.). 



CeritMopsis rosea A. Ad. Ann. Mag. N. H. (3), VII, 1861, p. 130. 



Tsu-Shima, 16 fms. (Ad.). 

 CeritMopsis cerina, baculum, clavula A. Ad. Ibid. 



Mino-Shima, 63 fms. (Ad.). 

 Cerithiopsis paxillus, pagodula A. Ad. t. c., p. 131. 



Corea Strait, 46 fms. (Ad.). 

 Seila dextroversa Ad. & Rve. Zool. Samarang, p. 45, pi. 11, f. 31. 



Tsu-Shima, 16 fms.; Corea Strait, 46 fms. (Ad.). 

 Seila cingulata A. Ad. Ann. Mag., VII, 1861, p. 131. 



Tsu-Shima, 16 fms. (Ad.). 



