NORTHWEST COAST MARINE SHELLBEARING MOHLUSKS. 19 
CHLAMYS ISLANDICUS Muller, 1776. 
Prodr. Zool. Danica, p. 248. — Aknold, Tert. Pectens Cal./p. 113, pi. 45, fig. 1. 
Arctic Ocean to Kamchatka and Puget Sound. Also Atlantic. 
CHLAMYS ISLANDICUS BERINGIANUS Middendorff, 1849. 
Beitr. Mai. Kossica, vol. 3, p. 12. — Arnold, Tert. Pectens Cal., pi. 44, figs. 2-4, 
Bering Sea. 
CHLAMYS ISLANDICUS PUGETENSIS Oldroyd, 1920. 
Nautilus, vol. 33, p. 136, pi. 4, figs. 5, 6. 
San Juan Island. 
CHLAMYS PAUCICOSTATUS Carpenter, 1864. 
Suppl. llep. Brit. Assoc., p. 645. — Arnold, Tert. Pectens Cal., pi. 39, figs. 3, 4. 
Catalina Island, California, to Gulf of California. 
Section PATINOPECTEN Dali, 1898. 
CHLAMYS CAURINUS Gould, 1850. 
Proc. Boston Soc. Nat. Hist., vol. 3, p. 345. — Arnold, Tert. Pectens Cal., 
p. 101, pi. 38, 39. 
Wrangell, Alaska, to Siletz Bay, Oregon. 
Section LEPTOPECTEN Verrill, 1837. 
CHLAMYS LATIAURITUS Conrad, 1837. 
Journ. Acad. Nat. Sci. Phila., 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. 238. pi. 18, fig. 10. 
Monterey, California, to Gulf of California. 
CHLAMYS LATIAURITUS FUCICOLUS Dali, 1898. 
Trans. Wagner Inst., vol. 3, pt. 4, p. 710 ; -pi. Vh 
On fioating 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 Dali, 1898. 
CHLAMYS CIRCULARIS Sowerby, 1835. 
Proc. Zool. Soc., p. 110; Thes. Conch. Pecten, p. 49, pi. 15, figs. 105, 106. — 
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 Pseudamusium H. and A. Adams, 1858. 
PSEUDAMUSIUM RANDOLPHI Dali, 1897. 
Nautilus, vol. 11, No. 8, p. 86; Proc. U. S. Nat. Mus., vol. 24, p. 559, pi. 
40, fig. 2. 
Bering Sea to Guaymas, Mexico. 
