NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. “ 107 
PURPURA NUTTALLII Conrad, 1837. 
Journ. Acad. Nat. Sci. Piiila., vol. 7, p. 264, pi. 20, fig. 22. 
Monterey, California, to Scammon Lagoon, Lower California. 
PURPURA NUTTALLII ACICULIGER Valenciennes, 1846. 
Voy. Venus, Atlas, pi. 10, fig. 1. 
San Pedro, California, to Scammon Lagoon, Lower California. 
PURPURA NUTTALLII ALBESCENS Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 332. 
San Pedro, California, to San Quentin Bay, Lower California. 
PURPURA NUTTALLII ALBOFASCIATA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 332. 
San Pedro to San Diego, California. 
Genus TRITONALIA Fleming, 1828. 
V 
TRITONALIA GRACILLIMA Stearns, 1871. 
Con^. Mem., No. 6, p. 1 ; Amer. J^urn. Conch., vol. 7, pi. 14, fig. 15. 
Monterey, California, to' San Geronimo, Island, Lower California. ' 
TRITONALIA GRACILLIMA OBESA (Stearns MS.) Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 333. 
Monterey, California, to Gulf of California. 
TRITONALIA LURIDA Middendorff, 1849. 
Mai. Rossica, p. 150, pi. 4, figs. 4, 5; Proc. U. S. Nat. Mus., vol .15, pi. 20, 
fig. 7, 1892. 
Forrester Island, Alaska, to Catalina Island, California. 
TRITONALIA LURIDA ASPERA Baird, 1863. (Plate 13, fig. 12.) 
Proc. Zool. Soc., p. 72. 
Sitka, Alaska, to San Pedro, California. 
TRITONALIA LURIDA MUNDA Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 663 ; Proc. U. S. Nat. Mus., vol. 15, pi. 20, fig. 3, 
1892. 
Middleton Island, Alaska, to San Diego, California. 
TRITONALIA LURIDA ROTUNDA Da!l, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 333. 
Moss Beach, to San Luis Obispo, California. 
TRITONALIA SQUAMULIFERA Carpenter, 1868. 
Gabb, Pal. Cal., vol. 2, p. 44. 
Santa Barbara to San Pedro, California. 
TRITONALIA FUSCONOTATA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 333. 
Monterey to Catalina Island, California. 
TRITONALIA POULSONI Carpenter, 1865. 
Journ. de Conchyl., ser. 3, vol. 5, p. 148. — Tryon, Man., vol.H, pi. 38, fig. 475. 
Santa Barbara, California, to Magdalena Bay, Lower California. 
TRITONALIA PAINEI Dali, 1903. (Plate 6, fig. 1.) 
Proc. Biol. Soc. Wash., vol. 16, p. 174. 
Dundas Bay, Alaska, to San Diego, California. 
