NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 19 



CHLAMYS ISLANDICUS Mullcr, 1776. 



1'rodr. Zool. Dauica, p. 24S. — Arnold, Tort. Pectens Cal., p. 113, pi. 45, fig. 1. 

 Arctic Ocean to Kamchatka and Puget Sound. Also Atlantic. 



CHLAMYS ISLANDICUS BERINGIANUS Middcndorff, 1849. 



Beitr. Mai. llossica, vol. 3, p. 12. — Arnold, Tert Pectens Cal., pi. 44, figs. 2-4. 

 Beiing Sea. 



CHLAMYS ISLANDICUS PUGETENSIS Oldroyd, 1920. 

 Nautilus, vol. 33, p. 13G, pi. 4, figs. 5, 6. 

 San Juan Island. 



CHLAMYS PAUCICOSTATUS Carpenter, 1864. 



Suppl. Ilep. Brit. Assoc, p. 645. — Arnold, Tert. Pectens Cal., pi. 39, figs. 3, 4. 

 Cataliua Island, California, to Gulf of California. 



Section PATINOPECTEN Ball, 1898. 

 CHLAMYS CAURINUS Gould, 1850. 



Proc. Boston Soc. Nat. Hist., vol. 3, p. 345. — Arnold, Tert. Pectens Cal., 



p. 101, pi. 3S, 39. 

 Wrangell, Alaska, to Siletz Bay, Oregon. 



Section LEPTOPECTEN Verrill, 1897. 



CHLAMYS LATIAURITUS Conrad. 1837. 



Journ. Acad. Nat. Sci. Pbila., vol. 7, p. 238, pi. 18, fig. 9. " 

 Monterey, California, to Lower California. 



CHLAMYS LATIAURITUS MONOTIMERIS Conrad, 1837. 



Journ. Acad. Nat. Sci. Phila., vol. 7, p. 23S. pi. 18, fig. 10. 

 Monterey, California, to Gulf of California. 



CHLAMYS LATIAURITUS FUCICOLUS Dall, 1898. 



Trans. Wagner Inst., vol. 3, pt. 4, p. 710; Zool. Sulphur Voy. Moll., pi. 17. 

 On floating kelp. 



CHLAMYS 7TUMBEZENSIS Orbigny, 1846. 



Voy. Amer. Mer., p. 663 ; Thes. Conch. Pecten, pi. 12, figs. 18, 19, 26. 

 Santa Barbara, California, to Peru. 



Section PLAGIOCTENIUM Dall, 1898. 

 CHLAMYS CIRCULARIS Sowerby. 1835. 



Proc. Zool. Soc, p. 110; Thes. Conch. Pecten, p. 49, pi. 15, figs. 105, 100.— 

 Arnold, Tert. Pectens Cal., pi. 44, fig. 6. 

 Monterey, California, to Payta. Peru. 



CHLAMYS CIRCULARIS AEQUISULCATUS Carpenter, 1865. 



Ann. Mag. Nat. Hist., ser. 3, vol. 15, p. 179. — Arnold, Tert. Pectens Cal., p. 



132 ; pp. 45-46, text figs. 1, 2, pi. 50, fig. 1. 

 Santa Barbara to Cape San Lucas, Lower California. 



Subgenus Pseudamtjsium H. and A. Adams, 1S58. 



PSEUDAMUSIUM RANDOLPHI Dall, 1897. 



Nautilus, vol. 11, No. 8, p. 80; Proc. U. S. Nat. Mus., vol. 24, p. 559, pi. 



40, fig. 2. 

 Bering Sea to Guaymas, Mexico. 



