38 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
end; the base evenly arcuate, the dorsal slopes nearly straight; near the 
posterior end the profile is obliquely attenuated above and below, terminat¬ 
ing in a point; ligament distinctly external with about 10 anterior, and 
more numerous posterior teeth. Length, 10.5; height, 5.5; diameter, 3 
mm. (Dali.) 
Type in U. S. N. M., No. 207251. Type locality, Station 2859, south¬ 
west of Sitka Bay, in 1569 fathoms. 
Range. Known only from the type locality. 
Genus TINDARIA Bellardi, 1875. 
Shell thick, globose, oval, closed, beaks swollen; anterior teeth 
stronger, but the posterior row longer. (Tryon. S. S. Conch.) 
Type. Tindaria arata Bellardi. 
Distribution. Bering Sea to Lower California. Fossil in the 
Pliocene of Italy. 
Tindaria californica Dali, 1916. 
Plate 3, fig. 3. 
Proc. U. S. N. M„ 52:400. 
Shell small, olivaceous, darker distally, inflated, smooth except for 
incremental lines, polished, swollen, inequilateral; beaks inconspicuous, 
with a large escutcheon bounded by an angle of the surface, but no lunule; 
anterior end rounded, plump, 4 mm. 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 12 
anterior and 18 posterior teeth; ligament strictly external, pallial sinus 
deep. Length, 10; height, 6; diameter, 4.5 mm. (Dali.) 
Type in U. S. N. M., No. 96972. Type locality, Station 2840 off 
Santa Barbara Islands, California, in 276 fathoms mud. 
Range. Santa Barbara Islands to San Diego, California. 
Tindaria brunnea Dali, 1916. 
Plate 3, fig. 4. 
Proc. U. S. N. M., 52:401. 
Shell small, inflated, solid, subtriangular, of a warm yellow brown 
color; beaks large, prominent, with no distinguishable lunule or escutcheon, 
the ligament short but wholly external and behind the beaks; the surface 
sculptured with rather regular fine incremental lines which, toward the 
margin, appear almost like concentric ripples; there are also very faint 
radial lines on some parts of the shell; base arcuate, dorsal slopes nearly 
straight, anterior end rounded, posterior rather bluntly pointed; hinge 
with about eight anterior and fourteen posterior teeth. Length, 7.5; height, 
6; diameter, 4 mm. (Dali.) 
