NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 67 
Subgenus Keeguelenia Rochebrune and Mabille, 1889. 
KERGUELENIA BRANNANI Steams, 1872. (Plate 15, figs. 13, 14.) 
I*roc. Cal. Acad. Sci., vol. 4, p. 249, pi. 1, fig. 4. 
Santa Barbara and Santa Catalina Islands; Laguna Beach, California. 
Genus WILLIAMIA Monterosato, 1884. 
WILLIAMIA VERNALIS Dali, 1870. 
Amer. Journ. Conch., vol. 6, p. 37, pi. 4, figs. 11 a-h, 1870 ; Journ. de Conch., 
vol. 26, p. 70. 
Crescent City to San Nicolas Island, and La Jolla, California, ^ossi}^ S 
WILLIAMIA PELTOIDES Carpenter, 1864. (Plate 15, figs. 10, 12.) 
Ann. Mag. Nat. Hist., vol. 50, p. 474. 
Catalina Island to Gulf of California. 
Suborder Stylommatophora 
Superfamily DITREMATA. 
Family ONCHIDIIDAE. 
Genus ARCTONCHIS Dali, 1905. 
ARCTONCHIS BOREALIS Dali, 1871. 
Amer. Journ. Couch., vol. 7, p. 135 ; Proc. Acad. Nat. Sci. Phila., 1876, pi. 6, 
fig. E. 
Port Moller and Aleutian Islands to northern California. 
Superorder STREPTONEURA. 
Order CTENOBRANCHIATA. 
Suborder Orthodonta. 
Superfamily TOXOGLOSSA. 
Family TEREBRIDAE. 
Genus TEREBRA (Bruguiere, 1789) Lamarck, 1799. 
Subgenus Striotekebrum Sacco, 1891. 
STRIOTEREBRUM PEDROANUM Dali, 1908. 
Bull. Mus. Comp. Zool., vol. 43, No. 6, p. 251. 
San Pedro and San Diego, California. 
STRIOTEREBRUM PEDROANUM PHILIPPIANUM Dali, 192y. 
Carpenter, Ann. Mag. Nat. Hist., ser. 3, vol. 15, p. 394, 1865. (Simplex 
Caipenter, not Conrad, 1830.) 
San Pedro, California, to head of Gulf of California. 
