NOETHWEST COAST MAKINE SHELLBEAKING MOLLUSKS. 195 
Genus TONICIA Gray, 1847. 
TONICIA PUSTULIFERA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 55, p. 516. 
San Pedro, California. 
Family MOPALIIDAE. 
Genus MOPALIA Gray, 1847. 
MOPALIA CILIATA Sowerby, 1840. 
Ann. Mag. Nat. Hist., p. 289 ; Concli. Illustr., fig. 79. 
Vancouver Island, British Columbia, to Lower California. 
MOPALIA CILIATA WOSNESSENSKII Middendorff, 1847. 
Bull. Acad. Sci., St. Petersburg, vol. 4, p. 119. — Pilsbry, Man., vol. 14, 
pi. 64, figs. 69-73. 
Unalaska, Alaska, to Santa Rosa Island, California. 
MOPALIA CILIATA ELEVATA Pilsbry. 1892. 
Man., vol. 14, p. 300, pi. 64, figs. 82, 83. 
Forrester Island, Alaska, to Puget Sound. 
MOPALIA MUSCOSA Gould, 1846. 
Proc. Boston Soc. Nat. Hist., vol. 2, p. 145; Rep. U. S. Expl. Exp., Moll., 
p. 313, fig. 436. 
Shumagin Islands, Alaska, to Rosario, Lower California. 
MOPALIA MUSCOSA HINDSII Reeve, 1847. 
Conch. Icon., Chiton, pi. 12, fig. 67 a-h . — Pilsbry, Man., vol. 14, pi. 62, 
figs. 99, 100. 
Sitka, Alaska, to Gulf of California. 
MOPALIA MUSCOSA PORIFERA Pilsbry, 1892. 
Man., vol. 14, p. 297, pi. 62, figs. 93, 94. 
Baulinas Bay, California. 
MOPALIA MUSCOSA LAEVIOR Pilsbry, 1918. 
Nautilus, vol. ^1, No. 4, p. 126. 
Olympia, Washington. 
MOPALIA MUSCOSA ACUTA Carpenter, 1855. 
Proc. Zool. Soc., p. 232. — Pilsbry, Man., vol. 14, p. 297, pi. 64, figs. 75-81. 
Santa Barbara to San Diego, California. 
MOPALIA MUSCOSA LIGNOSA Gould, 1846. 
Proc. Boston Soc. Nat. Hist., vol. 2, p. 142. — Pilsbry, Man., vol. 14, p. 299, 
pi. 63, figs. 58-59. 
Sitka, Alaska, to Magdalena Bay, Lower California. 
MOPALIA MUSCOSA KENNERLYI Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 648 ; Proc. Acad. Nat. Sci. Phila., for 1865, p. 59. 
Shumagin Islands, Alaska, to Monterey, California. 
MOPALIA MUSCOSA SWANII Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 648. | 
Shumagin Islands, Alaska, to Mont erey, California, I 
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