400 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



YOLDIA CAPSA, new species. 



Shell very thin, small, polished, smooth, compressed, the beaks 

 hardly rising above the general hingeUne; base deeply arcuate, the 

 dorsal margin very slightly convex; anterior end roimded, posterior 

 end slightly broader and flatter, obscm-ely pointed toward the dorsal 

 level; beaks slightly anterior to the middle line of the shell; hinge 

 with a few very small anterior and posterior teeth; the resilifer sub- 

 imibonal, not projecting. Length, 4.4; height, 8; diameter, 1.5 mm. 

 Cat. No. 212499, U.S.N.M. 



Station 3346, off Tillamook Bay, Oregon, in 786 fathoms. 



MALLETIA (MINORMALLETIA) TALAMA, new species. 



Shell large, thin, plump, of a uniform oval, with a brilliant, smooth, 

 light yellowish-olive periostracum ; beaks low, near the anterior third 

 with about eight V-shaped teeth in front of them on the hingeline 

 and about 36 much smaller teeth behind them; the latter are not 

 obviously V-shaped, are very uniform in size and appearance; the 

 hingeline is thickened under the anterior teeth, but the ligament is 

 strictly external. The shell is slightly wider and more compressed 

 behind the beaks but the difference is very small. Length, 23; 

 height, 15; diameter, 10 mm. Cat. No. 225384, U.S.N.M. 



Station 3603, off Pribiloff Islands, Bering Sea, in 1771 fathoms. 



MALLETIA (NEILO) FIORA. new species. 



Shell small, thin, inequilateral, smooth, polished, pale ohvaceous, 

 somewhat compressed, the beaks at 4 mm. behind the anterior 

 rounded end; the base evenly arcuate, the dorsal slopes nearly 

 straight; near the posterior end the profile is obhquely attenuated 

 above and below, terminating in a point ; ligament distinctly external 

 with about ten anterior and more numerous posterior teeth. Length, 

 10.5; height, 5.5; diameter, 3 mm. Cat. No. 207251, U.S.N.M. 



Station 2859, southwest of Sitka Bay, Alaska, in 1,569 fathoms. 



TINDARIA CALIFORNICA, new species. 



Shell small, olivaceous, darker distally, inflated, smooth except for 

 incremental Unes, poUshed, swollen, inequilateral; beaks inconspic- 

 uous, with a large escutcheon bounded by an angle of the sm-face, but 

 no lunule; anterior end rounded, plump, 4 nam. in front of the beaks; 

 posterior end attenuated, bluntly rounded, and slightly recurved, 

 the posterior dorsal slope being somewhat concave ; the base evenly 

 arched; hinge with 13 anterior and 18 posterior teeth; ligament 

 strictly external, pallial sinus deep. Length, 10.5; height, 6; diam- 

 eter, 4.5 mm. Cat. No. 96972, U.S.N.M. 



Station 2840, off the Santa Barbara Islands, Cahfornia, in 276 

 fathoms, mud. 



