NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 139 



ATLANTA DEPRESSA Gray, 1850. 



Figs. Moll. Anini., vol. 4, p. 101 ; Voy. Bonite, Atlas, pi. 20, figs. 31-37. 

 Pacific Ocean. Pelagic. 



ATLANTA QUOYII Gray, 1850. 



Figs. Moll. Anim., vol. 4, p. 101, pi. 242, fig. 1 ; Voy. Bonite, Atlas, pi. 20, figs. 



16-22. 

 Pacific Ocean in north latitude 33°, west longitude 135° 10'. Pelagic. 



ATLANTA CUNICULA Gould, 1852. 



Rep. U. S. Expl. Exp., Moll., p. 492, pi. 51, fig. 598. 

 North Pacific Ocean. Pelagic. 



Genus OXYGYRUS Benson, 1835. 



OXYGYRUS RANGI Loven, 1847. 



K. Vetensk. Akad. Forh., p. 491, pi. 4; Voy. Bonite, Atlas, pi. 18, figs. 18-24. 

 Pacific Ocean. Off Monterey, California. Pelagic. 



Suborder PECTINIBRANCHIATA. 



Superfamily DACTYLOGLOSSA. 



Family OVULIDAE. 



Genus SIMNIA (Leach) Risso, 1826. 



SIMNIA VIDLERI Sowerby, 1881. 



Proc. Zool. Soc, p. 63S, pi. 56, fig. 1. 

 Monterey to San Diego, California. 



SIMNIA ACICULARIS Lamarck, 1811. 



Ann. du Mus. Paris, vol. 16, p. 112.— Tryon, Man., vol. 7, pi. 5, figs. 23-25. 

 San Pedro to San Diego, California, and Acapulco, Mexico. 



SIMNIA VARIABILIS C. B. Adams, 1850. 



Panama Shells, p. 255. — Tryon, Man., vol. 7, pi. 5, fig. 44. 

 Monterey, California, to Panama. 



Subgenus Neosimnia Fischer, 1884. 



NEOSIMNIA BARBARENSIS Dall, 1892. 



Proc. U. S. Nat. Mus., vol. 15, p. 206, pi. 21, fig. 1. 

 Newport, California, to Gulf of California. 



NEOSIMNIA CATALINENSIS Berry, 1916. 



Nautilus, vol. 30, No. 2, p. 21, pi. 5,- fig. 3. 

 Monterey to Gulf of California. 



NEOSIMNIA UNIPLICATA Sowerby, 1848. 



Proc. Zool. Soc, p. 135.— Tryon, Man., vol. 7, pi. 5, fig. 39. 

 San Pedro, California, to Magdalena Bay, Lower California. 



