62 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



Genus VOLVULELLA Newton, 1891. 



VOLVULELLA CYLINDRICA Carpenter, 1863. 



Suppl. Rep. Brit. Assoc, p. 647; Ami. Mag. Nat. Hist., ser. 3, vol. 15, p. 179, 



1S65. 

 Vancouver Island south to Gulf of California. 



VOLVULELLA COOPERI Dall. 1919. 



Proc. U. S. Nat. Mus., vol. 5G, No. 2295, p. 297. 



Point Sur, California, to Scammon Lagoon, Lower California. 



VOLVULELLA CALIFORNICA Dall. 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 Dall. 1919. 



Proc. U. S. Nat. Mus., 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. 



Tbes. Conch., p. 5SS, pi. 125, fig. 125. 

 San Diego, California (Carpenter). 



Genus DIAPHANA Brown, 1827. 



DIAPHANA BRUNNEA Dall, 1919. 



Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 299. 

 Kodiak Island, Alaska. 



DIAPHANA CALIFORNICA Dall, 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. — Sars, Moll. Reg. Arct. Norv., pi. 18 fig. 4. 

 Bering Strait and Arctic Ocean. Circumboreal (Krause). 



Genus BROCKTONIA Iredale, 1915. 



BROCKTONIA POLYSTRIGMA Dall, 1908. 

 Proc. U. S. Nat. Mus., vol. 34, p. 246. 

 San Diego, California. 



