LOO CHOO MOLLUSKS. 185 



Malleus vulgaris Lam. 



In this species the valves are serpentine in their length. 

 Malleus albus Lam. 



Yaeyama. In this species the valves are straighter than in the 

 other. Altogether 21 fine specimens. 



PERNIDJE. 



Perna acutirostris Dkr.* Yaeyama. 

 Perna isoguomum Linn.* Yaeyama. 

 Perna costellata Conr.* Yaeyama. 



PINNIDJE. 

 Pinna nigrina Lam.* 



ABCIDJE. 



Area scapha Chemn.* Yaeyama. 

 Area (Scapharca) subcrenata Lischke.* Itoma Jima Is. 



ERRATA. 



P. 10. Add the following: 

 Haminea binotata n. sp. 



Shell cylindric-oval, hardly wider below, truncated above, rounded 

 beneath, thin, but rather solid, ruddy-corneous, with a small opaque- 

 white spot at each end, that at apex bounded below, that at colu- 

 mella, above, by an opaque orange or reddish tract, appearing only 

 on the latter part of the whorl. Surface polished, with excessively 

 fine and close spiral striae, and rather coarse growth wrinkles. 

 Aperture rather narrow, moderately enlarged below. Outer lips 

 rising slightly above the vertex, but by no means high-arched. Col- 

 umella concave, short, with a lunate, reflexed, but free, not adherent, 

 flange, but not fold. Apex closed or subperforate. Alt. ll,diam. 

 7 mm. 



Yaeyama, Loo Choo Is. (Stearns). 

 Haminea binotata var. Japonica n. v. 



Shell like the above in coloration and sculpture, but smaller, thin 

 and fragile, more swollen, the reflexed coluuiellar callus thinner and 

 adnate to body. Alt. 9, diam. 6'2 mm. 



