138 JAPANESE MOLLUSKS, ANATINACEA. 



wrinkles, the cuticle wriukled on posterior slope, and showing spaced^ 

 inconspicuous radiating cuticular threads toward each end. Ante- 

 rior extremity abruptly truncat9d ; posterior extremity rounded, 

 slightly gaping. Interior white ; lithodesma large. 



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



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



Nemoto and Amatsu, Boshiu, Hakodate (Stearns). 



These shells are more abruptly truncated anteriorly than speci- 

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

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

 JE. saxicola. 



PANDORID.ffi:. 



Pandora delicatula A. Ad. Conch. Icon., XIX, jil. ?,, f. 17. 

 Japan (Adams). 



MYOCHAMID.ff:. 

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

 Myodora fluctuosa Old. Otia, p. 161 ; Smith., P. Z. 8., 1880, p. 583. 



Kagoshima Bay (Stirap.). 



THRACIIDiE. 

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



Simoda (Stimpson). 

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



Kagoshima Bay (Stimpson). 



ANATINIDJE. 

 Anatina japonica Lisehke. Jap. Meeres-Conch., Ill, p. lOl, pi. 9, f. 7-10. 

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



Anatina fiexuosa Reeve. Rve., Conch. Icon., XIY, pi. 1, f. 5. 



Japan (Reeve). 



Anatina limicola 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 



