NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 127 

 PYRGISCUS ADUSTUS Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. 08, p. 108, pi. 10, fig. 12. 

 San Diego, California. 



Subgenus Mokmiia A. Adams, 1854. 



MORMULA LORDI E. A. Smith. 1880. 



Ann. Mag. Nat. Hist, ser. 5, vol. 0, p. 288; U. S. Nat. Mus., Bull. 68, pi. 11, 



fig. 4. 

 Sitka, Alaska, to Paget Sound. 



MORMULA REGINA Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. OS, p. 112, pi. 11, fig. 1. 

 Santa Rosa Island to Catalina Island, California. 



MORMULA CATALINENSIS Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. OS, p. 113, pi. 11, fig. 10. 

 Catalina Island, California. 



MORMULA ESCHSCHOLTZI Dall and Bartsch, 1907. 



Proe. U. S. Nat. Mus., vol. 33, p. 513, pi. 45, fig. 10. 

 Port Simpson to Vancouver Island, British Columbia. 



MORMULA TRIDENTATA Carpenter, 1865. 



Journ. de Conchyl., vol. 13, p. 147: U. S. Mus., Bull. 68, pi. 11, fig. 12. 

 Monterey to San Diego, California. 



MORMULA AMBUSTA Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. 68, p. 115, pi. 11, fig. 13. 

 San Pedro to San Diego, California. 



MORMULA SANTOSANA Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. 68, p. 117, pi. 11, fig. 7. 

 San Diego ? Todos Santos Bay, Dower California. 



MORMULA PENTALOPHA Dall and Bartsch, 1903. 



Mem. Cal. Acad. Sci., vol. 3, p. 282, pi. 1, fig. 1. 

 San Pedro to Todos Santos Bay, Lower California. 



MORMULA HETEROLOPHA Dall and Bartsch, 1909. 



U. S. Nat. Mus., Bull. 68, p. 118, pi. 11, fig. 9. 



San Diego, Califoimia, to San Hipolito Point, Lower California. 



MORMULA PERISCELIDA Dall and Bartsch. 1909. 



U. S. Nat. Mus., Bull. 68, p. 119, pi. 11, fig. 6. 

 Santa Rosa Island, California. 



Subgenus Baetschella Iredale, 1917. 



BARTSCHELLA LAMINATA Carpenter, 1856. 



Ann. Mag. Nat. Hist., ser. 3, vol. 15, p. 396 ; U. S. Nat. Mus., Bull. 68, pi. 12, 



fig. 16. 

 San Pedro, California, to Point Abreojos, Lower California. 



BARTSCHELLA ARATA Dall and Bartsch. 1909. 



U. S. Nat. Mus., Bull. OS, p. 125, pi. 12, fig. 12. 

 Off Catalina Island, California. 



