120 'bulletin 112, UNITED STATES NATIONAL MUSEUM. 
Subgenus Aclis s. s. 
? ACLIS TURRITA Carpenter, 1864. 
Suppl. Kep. Brit. Assoc., p. 657 ; Proc. Cal. Acad. Sci., vol. 3, p. 219, 1866 
Proc. U. S. Nat. Mus., vol. 39, pi. 62, fig. 4. 
San Pedro, California. Sa^u-^lbia^c? f 
7 ACLIS OCCIDENTALIS Hemphill, 1894. 
Zoe, vol. 4, No. 4, p. 395 ; Proc. U. S. Nat. Mus., vol. 39, pi. 62, fig. 2, 
San Diego, California. 
Genus NISO Risso, 1826. 
NISO LOMANA Bartsch, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2207, p. 350, pi. 49, fig. 4. 
Santa Rosa Island to Point Loma, California. 
NISO HIPOLITENSIS Bartsch, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2207, p. 850, pi. 49, fig., 5. 
San Diego, California, to San Hipolito Point, Lower California. 
Family P YR AMIDE LLIDAE. 
Genus PYRAMIDELLA Lamarck, 1799. 
Subgenus Longchaeus Morch, 1875. 
LONGCHAEUS ADAMSI Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 546 ; U. S. Nat. Mus., Bull. 68, p. 21, pi. 1, figs. 6 
6u, 1909. 
Monterey, California, to Mazatlan, Mexico. 
LONGCHAEUS MEXICANUS Dali and Bartsch, 1909. 
U. S. Nat. Mus., Bull. 68, p. 23, pi. 1, fig. 12. 
San Diego, California, to Scammon Lagoon, Lower California. 
LONGCHAEUS MAZATLANICUS Dali and Bartsch, 1909. " 
U. S. Nat. Mus., Bull. 68, p. 24, pi. 1, fig. 7. 
San Diego, California, to Cape Tepoca, western Mexico. 
Subgenus Phaecidella Dali, 1889. 
PHARCIDELLA ACHATES Gould, 1852. 
' Boston Journ. Nat Hist., vol. 6, p. 385, pi. 14, fig. 13. 
? Santa Barbara, California (Jewett). Mazatlan, Mexico. 
Genus TURBONILLA Risso, 1826. 
TURBONILLA GILLI Dali and Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, p. 493, pi. 14, fig. 5. 
Catalina Island to San Diego, California. 
TURBONILLA GILLI DELMONTENSIS Dali and Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, p. 494, pi. 14, fig. 7. 
Monterey Bay, California. 
