412 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



Plate XVI. 



WEST AMERICAN VENERID.E. 



Fig. 1. Lioajmascammoni Dall. Cat. No. 163121, U.S.X.M.; length, 20.5 mm.; Port 

 Simpson, British Columbia; p. 407. 



2. Chione {Lirophom) oUitemlit Dall. Cat. No. 11821, U.8.N.M.; length, 24.0 



mm.; Humboldt Bay, Gulf of Panama; p. 405. 



3. Liocyma beckii Dall. Cat. No. 163110, U.S.N.M.; length, 14.0 nnn.; Plover 



Bay, near Bering Strait, Eastern Siberia; p. 407. 



4. Psephidia ovalis Dall. Cat. No. 163089, U.S.N.M.; length, 9.0 nun.; Catulina 



Island, California; p. 407. 



5. Psephidia lordi Baird. Cat. No. 163071, F.S.N.M.; length, 7.5 mm.; Kyska 



Harbor, Aleutian Islands; p. 407. 



6. The same, umbonal view showing lunule. 



7. Chione (Lirophora?) schottii D-Al. Cat. No. 6226, U.S.N. M.; length, 14.0 mm.; 



Humboldt Bay, Gulf of Panama; p. 404. 



8. Pifaria {Lamelli concha) caUkomata Dall. Cat. No. 96388, U.S.N.:\I.; length, 



47.0 mm.; Bay of Panama; p. 402. 



9. Chione {Timoclea) pertincta Dall. Cat. No. 102457, U.S.N.M.; length, 37.0 



mm. ; Galapagos Islands; p. 405. 



