1153 
26 
Margaritana margaritifera L. 
1487 Margarites vorticiferus Dall, Cal ac pr 5:59, t 2, f 4a-b. 
424 
2338 
164 
165 
908 
276 
1266 
Marginella jewetti Carpenter. 
Marginella politula Cooper. 
Marginella regularis Cpr 
Marginella subtrigona Cpr 
Marginella varia Sowerby. 
Martesia intercalata Cpr 
Megatebennus bimaculatus Dall. 
97 Melampus olivaceus 
2093 
Melania acutifilosa 
46 Melantho decisa 
927 
2701 
2754 
910 
207 
369 
468 
373 
909 
911 
1209 
1210 
573 
2453 
2574 
912 
913 
914 
915 
916 
2572 
917 
918 
$21 
1158 
2735 
2697 
2734 
2552 
2273 
2553 
2700 
2337 
161 
2094 
2554 
432 
919 
179 
2712 
2336 
127 
920 
460 
2455 
824 
2003 
2755 
Melaniella? eiseniana J. G. Cooper. 
Melina Chemnitziana 
Menetus opercularis Gld. 
Mesalia reticulata Mighels. 
Mesalia tenuisculpta Cpr 
Mera modesta Carpenter 
Mera obtusa Carpenter. 
Merethrix toreuma Gould 
Magerlia jeffreysi Dall. 
Mesodon armigerus Ancey. 
Mesodon columbianus Lea. 
Mesodon devius Gould. 
Metaxia diadema 
Metzgeria Californica 
Micrarionta desertorum 
Microphysa conspecta Bland. (See 1206.) 
Microphysa ingersolii Bland. 
Microphysa lansingi. (See 2743.) 
Microphysa pygmezea Draparnaud. 
Microphysa stearnsi (See 2744.) 
Milax gagates plumbea 
Miralda quinguecincta Carpenter. 
Milneria halioticola Dall. 
Milneria minima Dall 
Miodon prolongatus Carpenter. 
Miralda Californica 
Mitra Belcheri Swainson. 
Mitra dolorosa 
Mitra Fultoni 
Mitra funiculata Reeve. 
Mitra Idze Melville. 
Mitra lens 
Mitra lowei Dall. 
Mitra maura Swains 
Mitra nodocancellata 
Mitra orientalis Gray. 
Mitromorpha aspera Carpenter. 
Mitromorpha effusa Carpenter. 
Mitromorpha filosa Cpr 
Mitramorpha filosa intermedia 
Mitromorpha gracilior Hemphill. 
Modiola capax 
Modiola fornicata Carpenter. 
Modiola modiolus Linne. 
Modiola polita Verrill. 
Modiola recta Conr 
Modiola plicatula Lam. 
Modiolus demissus Dillwyn. 
2454 
