550 PROCEEDINGS OF THE ACADEMY OF [July 



NEW JAPANESE MARINE MOLLUSCA: PELECYPODA. 

 BY HENRY A. PILSBRY. 



The Pelecypods described herein were nearly all received from Mr. 

 Y. Hh-ase, of Kyoto, Japan. Most of them are from Hirado, Hizen, 

 at the extreme west of Kyushu, where the wide-ranging species of 

 the central Indo-Pacific province rule, and the exclusively Japanese 

 faunal element is less conspicuous than farther north and east. That 

 many new forms are encountered even here but confirms the experi- 

 ence of other recent workers, that in all parts of the Indo-Pacific area 

 there has been great local differentiation. 



In these Proceedings, p. 6, I described a Conus from Ivikai-ga-shima 

 as C. dormitor. My attention has been called by several friends to 

 the prior use of this name for an Eocene species; and I would there- 

 fore call the Japanese form Conus comatosa. It is probably ancestral 

 to the recent C. sieholdi Rve. 

 Mactra carneopicta n. sp. PI. XXXIX, figs. 1, 2, 3. 



Shell oval, the beaks shghtly in front of the middle ; moderately thin, 

 pure white inside; externally profusely painted with flesh-colored 

 rays on a whitish ground, covered with a very thin yellow cuticle 

 toward the margins. Anterior and posterior dorsal areas closely and 

 deeply radially sulcate, and the lower part of the anterior half is con- 

 centrically irregularly sulcate; the rest of the surface being smooth. 

 The palHal sinus is very short and semicircular, the muscle-impressions 

 and paUial line but faintly marked. The hinge is that of the typical 

 group of Mactra. Length 60, alt. 45, diam. 28.5 mm. 



Wakatsuuri, Etami. Type No. 86,294, A. N. S. P., from No. 1,281 

 of Mr. Hirase's collection. 



This species resembles M. antiquata Spengl. somewhat, but is not 

 triangular and is white within. It is not unlike some forms of M. 

 stultorum in coloration. 



Spisula (Oxyperas) bernardi n. sp. PI. XXXIX, figs. 4, 5, 6. 



Shell long and narrow, the altitude contained about 1.8 times in 

 the length; somewhat triangular, compressed; moderately solid; the 

 beaks at the anterior two-fifths of the length. White under a closely 

 adherent drab and whitish cuticle, which is irregularly dappled with 



