178 BULLETIlSr U2, UNITED STATES NATIONAL AIUSEUM. 
SOLARIELLA RHYSSA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, p. 360. 
Catalina Cliannel, California. 
? SOLARIELLA NUDA Dali, 1896. 
Proc. U. S. Nat. Mus., vol. 18, p. 9 ; Bull. Mus. Comp. Zool., vol. 43, pi. 3, 
figs. 5, 7. 
Monterey, California, to Clarion Island, in deep water. 
Subgenus Machaeeopiax Friele, 1877. 
MACHAEROPLAX VARICOSUS Mighels and Adams, 1842. 
Boston Journ. Nat. Hist., vol. 4, p. 46, pi. 4, fig. 14. 
Arctic Ocean to San Diego, California. Also Atlantic. 
MACHAEROPLAX OBSCURUS Couthouy, 1838. (Plate 18, figs. 11, 12.) 
Boston Journ. Nat. Hist., vol. 2, p. 100, pi. 3, fig. 2. 
Arctic Ocean to the Fuca Strait. Circumboreal. 
MACHAEROPLAX PAUPERCULUS Dali, 1919. (Plate 18, fig. 15.) 
Proc. U. S. Nat. Mus., vol. 56, p. 363. 
Arctic Ocean to the Aleutian Islands. 
Genus MARGARITES Leach, 1847. 
Subgenus Pupillaria Dali, 1909. 
PUPILLARIA PUPILLA Gould, 1849. (Plate 17, figs. 2, 10.) 
Proc. Boston Soc. Nat. Hist., vol. 3, p. 91 ; Rep. U. S. Expl. Exp., Moll., 
fig. 208. 
Nunivak Island, Bering Sea, to San Pedro, California. ? San Diego, in 
deep water. 
PUPILLARIA SORDIDA Hancock, 1846. (Plate 17, figs. 11, 12.) 
Ann. Mag. Nat. Hist., vol. 18, p. 324. 
Arctic coast, Bering Strait and the Okhotsk Sea. ? North Japan. Circum- 
boreal. 
PUPILLARIA CINEREA Couthouy. 1838. 
Boston Soc. Journ. Nat. Hist., vol. 2, p. 99, pi. 3, fig. 9. 
Bering Strait to Port Etches, Alaska. Circumboreal. 
PUPILLARIA VORTICIFERA Dali, 1873. 
Proc. Cal. Acad. Sci., vol. 5, p. 59, pi. 2, fig. 4. 
Bering Strait and Sea, south and east to Unalaska, Alaska. 
PUPILLARIA VORTICIFERA ECARINATA Dali, 1919. 
Sci. Results Canadian Arctic Exp., vol. 8, p. 22 A, pi. 2, fig. 5. 
Southwest of Point Barrow, Arctic Ocean, and south and east to the 
Aleutians. 
PUPILLARIA VORTICIFERA SHARPII Pilsbry, 1898. 
Proc. Acad. Nat. Sci. Phila., p. 486. 
Unalaska to Port Althorp, Alaska. 
PUPILLARIA SALMONEA Carpenter, 1864. (Plate 18, figs. 6, 9.) 
Suppl. Rep. Brit. Ass 'C., p. 653 ; Proc. Cal., Acad. Sci., vol. 3, p. 158, Mon- 
terey, California. 
