16 MARINE SHELIS. 
LUTRICOLA. 
Dulricolasaltas. 2 arrest? «ste Conr...Santa Rosa 1., California 
LYCIMA. 
Liyenmna vipenis..2 6) eee ee tee Dall... ie Alaska 
LYONSIA. 
Lyonsia californica...) 0... Conr..... . “eee California 
Lyousia mitiday te fever. sete Gid........San Diego California 
zi te MPO yare. 2252 2 ... Tomales Bay, California 
MACH AERA. 
Machezera :cosiahare.. f.. 4 ot... | Gid. (See Siliqua costata.) 
Machrera pataler ce 2). ts}. Dixon ) 
= Solecurtus maximus.... Wood |... .Washington Territory 
= Solecurtus grandis.... .G@mel. } 
MACOMA. 
Macoma eulentulart. 2.0.26: Brod. and Sby.... 4... California 
Macoma eadalise es: \sa=. 2 Sees NUL. 5... 8 ee California 
Macoma inconspicua Sby. ) : : 
Sig Rt RS a, Pie ones falifornia 
= Sanguinolaria californiana..Conr { 2 < 
Macoma.indentata ....... aa OF 1) SST 2 A - California 
Macoma ang uiata. 2-45. 25 B24. Desh... i.e California 
Macoma nasuta ..... Se auhseiee ee Cone... eee California 
Macona seCiateerno. eros oe Cont... ... Yaa California 
NDA OM AT CNSHG ce ees cyore ram peveean Gid | 
vee nasuta. Pit Se Seas a es Conr ) mare ae ee oes Se 
Macoma yoldiformis........... Cpr.. .Santa Rosa I., California 
MACRON. 
Macron “kelbentiit; < Ses eee coz AGWINS:... ... See a ee California 
Macron divides sce sae pen PACLINS «<<. eee .. ..California 
MACTRA. 
Mactra (Standella) latteralis....Say .......... Atlantic Coast 
Mactra‘Tavyen@l, <2. genase ON ss . oS eee Florida 
