138 JAPANESE MOLLU8K8, ANATINACEA. 



wrinkles, the cuticle wrinkled on posterior slope, and showing spaced, 

 inconspicuous radiating cuticular threads toward each end. Ante- 

 rior extremity abruptly truncated; posterior extremity rounded, 

 slightly gaping. Interior white ; lithodesma large. 



Length 24, alt. 14, diam. 11 mm. 



Length 19, alt. 11}, diam. 11 mm. 



Nemoto and Amatsu, Boshiu, Hakodate (Stearns). 



These shells are more abruptly truncated anteriorly than speci- 

 mens of Lyonsia navicula before me, and they differ in the same way 

 from Entodesma saxicola of the same size. The lithodesma is as in 

 E. saxicola. 



PANDORIDJE. 



Pandora delioatula A. Ad. Conch. Icon., XIX, pi. 3, f. 17. 

 Japan (Adams). 



MYOCHAMIDJE. 



Myodora triangularis A. Ad. Dkr., Index, p. 181, pi. 7, f. 11, 12. 

 Myodora fluctuosa Old. Otia, p. 181 ; Smith., P. Z. 8., 1880, p. 583. 



Kagoshima Bay (Stirap.). 



THRACIIDi. 



Thracia pusilla Gld. Otia Conoh., p. 161. 



Simoda (Stimpson). 

 Thracia concinna Old. Otia Conch., p. 161. 



Kagoshima Bay (Stimpson). 



ANATINIDJE. 

 Anatina japonioa Lischke. Jap. Meeres-Conch., Ill, p. 101, pi. 9, f. 7-10. 



Bay of Yedo (Lischke) ; Yokohama (Stearns). 

 Anatina flexuosa Reeve. Rve., Conch. Icon., XIV, pi. 1, f. 5. 



Japan (Reeve). 

 Anatina limioola Reeve. Rve., Conch. Icon., XIV, pi. 4, f. 27. 



Japan (Reeve). 

 Anatina kamakurana n. sp. PI. Ill, figs. 2, 3. 



Shell elongated, rather ventricose, gaping at both ends, irregularly 

 wrinkle-striate and minutely granulated as usual, fragile; posterior 

 end longer than the anterior and narrower, rounded, moderately 

 gaping; anterior end broadly rounded, but slightly gaping; dorsal 

 margin nearly parallel with the basal, but rising in front of the 



