JAPANESE MOLLUSKS, MACTRACEA. 119 



Mactra ornata Gray. C. Icon., f. 58. 



Japan (Dkr.). 

 Mactra spectabilis Lischke. J. M. C., II, p. 120, pi. 11, f. 1, 2. 



Kiushiu (Lischke) ; Inland Sea (Stearns). 



Mactra veneriformis Deshayes. C. Icon., f. 2 ; Conchyl. Cab., p. 63, pi. 22, f. 3, 8a. 



Kiushiu, Tokyo Harbor (Lischke). Numerous young specimens 

 taken by Stearns. 

 Mactra veneriformis var. zonata Lischke. J. M. C., II, p. 121, pi. 9, f. 7, 8. 



Bay ofYedo. 

 Mactra lurida Phil. Abbild. II, p. 136, pi. 3, f. 3. 



Luchu Is. 

 Mactra crossei Dkr. Index, p. 183, pi. 7, f. 1-4. 



Tokyo (Rein). 

 Mactra bonneaui Bernardi. Journ. de Conch., 1858, p. 92, pi. 2, f. 2. 



Strait of Tartary (Bern.) ; Coast of Prov. Kii (Stearns). It is 

 very like M. veneroides. 



Mactra straminea Dkr. Index, p. 183, pi. 7, f. 5, 6. 

 Japan (Dkr.). 



Mactra sachalinensis Schrenck. Amurlandes Moll., p. 575, t. 23, f. 3-7 ; (Syn. : 

 M. luhdorfii Dkr., Novit. Conch., p. 60, pi. 20, f. a, c. 



Hakodate, used very commonly for food (Stearns, et at). 



Spisula grayana Schrenck. Phil., Abbild., I, p. 165, pi. 1, f. 1, as M. ponderosa, 

 Ochotch Sea (Midd.). 



Eaeta pulchella Adams & Rve. Zool. Samarang, pi. 23, f. 1 ; (Syn. Jf. rostralis 

 Desh., C, Icon., VIII, Mactra, f. 119). 



Off Yokohama in 8 to 14 fathoms (Chall.) ; Yokohama (Stearns). 

 Eaeta pellicula Desh. C. Icon., f. 124. Japan (Cuming). 

 Eaeta yokohamensis n. sp. PI. Ill, figs. 4, 5. 



Shell small, thin, fragile, white, inflated, ovate-triangular ; beaks 

 somewhat posterior. Anterior end broad, rounded, posterior end 

 very narrow, triangular ; beaks and dorsal slopes of valves coarsely 

 concentrically corrugated ; median and lower portion of valves 

 smooth. Lunule large ; chondrophore small, but little projecting. 

 Adductor and pallial impressions not distinguishable. Length 17, 

 alt. 12, diam. 8J mm. 



Yokohama (Stearns). 



