68 
904 Margarita lirulata Carpenter. 
Sitka to San Diego, California. 
905 Margarita pupilla Gould. 
Ounalaska to San Pedro, Cal. 
906 Margarita varicosa Mighels. 
Nearctic—south to latitude 48 degrees. Canada, and Vancouver 
Island. 
907 Marginella Pyriformis Carpenter. 
Vancouver island to San Diego. 
908 Marginella varia Sowerby. 
Santa Barbara to Mexico. West Indies. 
909 Magerlia jeffreysi Dall. 
Synonym of Laqueus jeffreysi. 
910 Mesalia reticulata Mighels. 
Nearctic—south to Maine, and Vancouver Island. 
911 Mesodon armigerus Ancey. 
Northern California to Monterey, Cal. 
912 Microphysa conspecta Bland. (See 1206.) 
Mountains of Colorado to San Francisco bay and Monterey, 
California. 
913 Microphysa ingersolii Bland. 
Kansas, Colorado, Oregon, Utah. 
914 Microphysa lansingi. (See 2743.) 
915 Microphysa pygmezea Draparnaud. 
Northern Europe, Maine to Texas, Sierra Nevada to Vancouver 
Island and San Francisco, Cal. 
916 Microphysa stearnsi (See 2744.) 
917 Miralda quinguecincta Carpenter. 
Southern California to Mazatlan. S. D., Cal.—H. Hemphill. 
918 Milmeria halioticola Dall. 
Monterey, to San Diego, Cal. 
919 Mitromorpha effusa Carpenter. 
Straits of Fuca, Washington. 
920 Modiola fornicata Carpenter. 
Bodega bay to San Pedro, Cal. 
921 Modiolaria corrugata Stimpson. 
Circumboreal—south to Europe, North Carolina, and Alaska. 
922 Modiolaria levigata Gray. 
Circumboreal?—Ounalaska to Washington. 
923 Modiolaria marmorata Forbes. 
Circumboreal—Finland to Canary Islands—Arctic sea to 
Straits of Fuca. 
924 Modiolaria nigra Gray. 
Nearctic?—Arctic sea to Scotland and North Carolina—south 
to Vancouver Island—Asia? 
925 Modiolaria taylori Dall. 
Vancouver Island. 
926 Mopalia sinuata Carpenter. 
Puget Sound to San Francisco. 
927 Melaniella? eiseniana J. G. Cooper. 
Sierra Laguna, Lower California, near Cape St, Lucas. 
928 Miuricidea gracillima Stearns. 
Synonym of Ocinebra gracillima. 
929 Muricidea interfossa Carpenter. 
Synonym of Ocinebra interfossa. 
930 Muricidea circumtexta Stearns. 
Monterey to Santa Barbara Islands, Cal. San Miguel Isl. 
Synonym of Ocinebra circumtexta. 
931 Muricidea foveolata Hinds. 
Santa Barbara, Cal., to Gulf of California. 
