NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 193 
Section RHOMBOCHITON Berry, 1919. 
ISCHNOCHITON REGULARIS Carpenter, 1855. 
Proc. Zool. Soc., p. 232. — Pilsbey, Man., vol. 14, p. 142, pi. 18, figs. 41-46. 
Mendocino County, California, to Monterey. 
Section TRIPOPLAX Berry, 1919. 
ISCHNOCHITON TRIFIDUS Carpenter, 1864. 
Suppl. Rep. Brit, Assoc, p. 649. — Pilsbey, Man., vol. 14, p. 141, pi. 18, fig. 40. 
Shumagin Islands, Alaska, to Puget Sound. 
Genus CHAETOPLEURA Shuttleworth, 1853. 
CHAETOPLEURA GEMMEA Carpenter, 1892. 
Pilsbey, Man., vol. 14, p. 31, pi. 13, figs. 69-74. 
Monterey, California, to Magdalena Bay, Lower California. 
CHAETOPLEURA BEANII Carpenter, 1857. 
Mazatlan Cat., p. 197. — Pilsbey, Man., vol. 14, p. 32. 
Unalaska, Alaska, to Mazatlan, Mexico. 
CHAETOPLEURA PARALLELA Carpenter, 1864. 
Ann. Mag. Nat. Hist., ser. 3, vol. 13, p. 314. — Pilsbey, Man., vol. 14, p. 34. 
pi. 12, fig. 50. cs. 
San Diego, California, to Cape San Lucas, and West Colombia. 
CHAETOPLEURA PRASINATA Carpenter, 1864. 
Ann. Mag. Nat. Hist., ser. 3, vol. 13, p. 314. — Pilsbey, Man., vol. 14, p. 34, 
San Diego, California, to Cape San Lucas. 
CHAETOPLEURA LACTICA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 55, No. 2283, p. 509. 
Catalina Harbor, California. 
Section DENDROCHITON Berry, 1911. 
? CHAETOPLEURA THAMNOPORA Berry, 1911. 
Proc. Acad. Nat. Sci. Pliila., p. 487, text figs. 1-7, pi. 40. 
Resurrection Bay, Alaska, to San Martin Island, Lower California. 
? CHAETOPLEURA GOTHICA Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 649. — Pilsbey, Man., vol. 14, p. 74 ; vol. 15, p. 65, 
pi. 15, figs. 28, 29. 
Monterey to Catalina Island, California. 
Genus PALLOCHITON Dali, 1S7^, 
PALLOCHITON LANUGINOSUS (Carpenter, MS.) Dali, 1879. 
Proc. U. S. Nat. Mus., vol. 1, p. 297, pi. 3, fig. 21; vol. 4, 1882, p. 287.— 
Pilsbey, Man., vol. 14, p. 257, pi. 56, figs. 1-11. 
San Diego, California, to San Ignacio Lagoon, Lower California. 
Genus CALLISTOCHITON Carpenter, 1882. 
CALLISTOCHITON PALMULATUS Carpenter, 1892. 
Pilsbey, Man., vol. 14, p. 262, pi. 58, figs. 12-16. 
Monterey, California, to San Marco Island, Lower California. 
