2696 
2344 
921 
$25 
922 
923 
924 
925 
1170 
515 
2404 
152 
154 
416 
151 
153 
2492 
2493 
1280 
1561 
1281 
926 
1282 
1700 
3041 
1579 
2894 
2895 
2896 
2885 
2287 
1644 
1645 
1629 
1630 
1631 
1632 
2456 
1400 
2238 
2562 
560 
1401 
2457 
2103 
2530 
140 
142 
2411 
930 
2285 
407 
931 
928 
2458 
143 
929 
932 
933 
934 
27 
Modiolus Diegensis 
Modiolus opifex Say. 
Modiolaria corrugata Stimpson. 
Modiolaria denticulata Dall 
Modiolaria levigata Gray. 
Modiolaria marmorata Forbes. 
Modiolaria nigra Gray. 
Modiolaria taylori Dall. 
Moera salmonea Carpenter. 
Mohnia frielei Dall. 
Monia macroschisma Desh. 
Monoceros engonatum Conr 
Monoceros engonatum var. spiratum Blainv 
Monoceros lapilloides Conrad. 
Monoceros lugubre Sby 
Monoceros pauciliratum Stearns 
Montereina 
Montereina nobilis 
Mopalia ciliata Sowerby. 
Mopalia ciliata Hindsii Sby. 
Mopalia lignosa Gould. 
Mopalia sinuata Carpenter. 
Mopalia wossnessenskii Middendorf. 
Mopalia imporcata Cpr. 
Mopalia vespertina Gould. 
Mopalia Wossnessenskii Swansii 
Mopalia muscosa Gould. 
Variety Lignosa Gould. 
Variety Hindsii Reeve. 
Mopalia heathii Pilsbry. 
Morum tuberculosum Sby. 
Mulinia palida Brod. & Sby. 1829. 
Mulinia Gabbi Tryon. 1869. 
Mulinia modesta Dall, Nautilus 8:5 t 1 f (lower). 
Mulinia coloradoensis Dall, Nautilus 8:6, t 1, upper f. 
Variety acuta Dall. Nautilus 8:6 t 1 left f. 
Mulinia Bradleyi Dall, Nautilus 8:6. 
Murex Californicus Dall. 
Murex (Pteropurpura) Carpenteri Dall. 
Murex carpenteri tremperi 
Murex Carpenteri alba 
Murex (Chicoreus) leeanus Dall. Off Cerros Isl. 
Murex (Pteropurpura) petri Dall, Nautilus 14:37 (1900). 
Murex Painei 
Murex palma-rosze Mexicana 
Murex (Phyllonotus) santarosana 
Murex trialatus Sby 
Muricidea barbarensis Gabb 
Muricidea californica Hinds. 
Muricidea circumtexta Stearns. 
Muricidea dubia Sby. 
Muricidea fasceolata Hinds. 
Muricidea foveolata Hinds. 
Muricidea gracillima Stearns. 
Muricidea incessa Brod. 
Muricidea incisa Brod 
Muricidea interfossa Carpenter. 
Muricidea lurida Middendorf. 
Muricidea poulsoni Carpenter, 
Muricidea salebrosa King. 
