62 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
Genus VOLVULELLA Newton, 1891. 
VOLVULELLA CYLINDRICA Carpenter, 186^. 
Suppl. Rep. Brit. Assoc., p. 647 ; Ann. Mag. Nat. Hist., ser. 3, vol. 15, p. 179, 
1865. 
Vancouver Island south to Gulf of California. 
VOLVULELLA COOPERI Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 297. 
Point Sur, California, to Scammon Lagoon, Lower California. 
VOLVULELLA CALIFORNICA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 298. 
Santa Rosa Island to San Diego, California. 
Family SCAPHANDRIDAE. 
Genus SCAPHANDER Montfort, 1810. 
SCAPHANDER WILLETTI Dali, 1919. 
Proc. U. S. Nat. IMus., vol. 56, No. 2295, p. 299. 
Forrester Island, Alaska. 
Genus ATYS Montfort, 1810. 
ATYS CASTA Carpenter. 1864. 
Ann. Mag. Nat. Hist., ser. 3, vol. 13, p. 314. 
Catalina Island to Gulf of California. 
ATYS NONSCRIPTA A. Adams, 1850. 
Thes. Conch., p. 588, pi. 125, fig. 125. 
San Diego, California (Carpenter). 
Genus DIAPHANA Brown, 1827. 
DIAPHANA BRUNNEA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 299. 
Kodiak Island, Alaska. 
DIAPHANA CALIFORNICA Dali. 1919. 
Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 299. 
San Pedro, California, to South Coronado Island. 
DIAPHANA GLOBOSA Loven, 1846. 
Index Moll. Scand., p. 11. — Saks, Moll. Reg. Arct. Norv., pi. 18. fig. 4. 
Bering Strait and Arctic Ocean. Circumboreal (Krause). 
Genus BROCKTONIA Iredale, 1915. 
BROCKTONIA POLYSTRIGMA Dali, 1908. 
Proc. U. S. Nat. Mus., vol. 34, p. 246. 
San Diego, California. 
