402 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



attenuated ; about 1 1 teeth on each side of the hinge, the Hgament 

 wholly external. Length, 4.5; height, 3.2; diameter, 2 mm. Cat. 

 No. 215595, U.S.N.M. 



Station 2923, off San Diego, Cahfornia, in 822 fathoms. 



TINDARIA CERVOLA, new species. 



Shell small, thin, subtriangular, of a uniform oUve color, finely 

 uniformly concentrically sculptured, with a few microscopic radial 

 striulae; base conspicuously arcuate, dorsal slopes nearly straight, 

 the anterior slope shorter, the anterior end rounded, the posterior 

 bluntly pointed, an extremely narrow and small lanceolate lunule 

 and escutcheon present; beaks conspicuous, the prodissoconch visi- 

 ble, whitish; about 10 anterior and 14 posterior teeth, the ligament 

 small, wholly posterior. Length, 4; height, 2.7; diameter, 2 mm. 

 Cat. No. 215594, U.S.N.M. 



Station 2923, off San Diego, Cahfornia, in 822 fathoms. 



GLYCYMERIS CORTEZIANA. new species. 



Shell solid, white with a brownish periostracum, the surface finely 

 concentrically sculptured, with less conspicuous fine radiating striae, 

 on which the periostracum exhibits ciliated lines; valves moderately 

 compressed, suborbicular, evenly rounded in front and below, some- 

 what produced behind, the lower margins finely crenulated; beaks 

 small, inconspicuous; area very narrow, closely divaricately grooved; 

 hinge plate broad, with about 12 anterior and 16 posterior teeth. 

 Length, 22 ; height, 20 ; diameter, 1 1 mm. Cat. No. 2 1 243 1 , U.S.N.M. 



Station 2918 on the edge of Cortez Bank, California, in 67 fathoms. 



GLYCYMERIS MIGUELIANA, new species. 



Shell solid, white with sparse zigzag lines of reddish brown and in- 

 ternally often with a touch of brown near the posterior margin; sur- 

 face smooth except for irregularities of growth; valves suborbicular^ 

 anterior side sliglitly longer, posterior hardly produced; beaks low, 

 area small and divaricately grooved; inner basal margin crenulated; 

 anterior teeth 10-14, posterior 9-12; valves moderately convex. 

 Length, 23; height, 22; diameter, 14 mm. Cat. No. 120775, U.S.N.M. 



Station, San Miguel Island, California. 



LIMOPSIS SKENIA. new species. 



Shell small, finely reticulately sculptured, with a longhaired vel- 

 vetty periostracum; narrow, high, rather inflated, thin, whitish 

 under the brown periostracum; beaks small, area small, hinge line 

 short, with one outer large and one or two small inner teeth on each 

 side of the resihfer. General form obhque. Length, 7; height, 9.2; 

 diameter, 6.5 mm. Cat. No. 205883, U.S.N.M. 



