178 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER. 
SPECIES CONFINED TO THE LOWER Mi1ocENE—C ontinued 
GENERA AND SPECIES 
San Lorenzo 
Vaqueros 
Pa ea Saal 
Arca montereyana Osmont........sesseeecrccccccseereee 
Arca obispoana Conrad ........sccc cece eee c cert enecteeee 
Arca osmonti Dall ......cccc cece cece c cece eer creer eecces 
Cardium vaquerosense Arnold........ fe Pa OAL Mieco tay Seen ete x 
Chione conradiana Anderson .......ceceececcseceereeeees x 
Chione mathewsont GabbD .....--ceeceeceeseeeecccecreces ? 
Corbicula dumblei Anderson.......--.csceecccesccesceces 
Dosinia conradi Gabb.....cecccceccccccccecccscccesccses 
Dosinia mathewsont Gabb......cccrccssccesccrcvccserecs 
Glycimeris barbarensis Conrad.........seeceecrceeeeeeees 
Glycimeris branneri Arnold ......-+.seeeceeeeeeereceees 
Hemimactra lenticularis Gabb .......eeeecececeeeeccceees 
Leda cahillensis Arnold .........cccceceecccccesecccceers 
Macoma piercei Arnold ..........eeee ee ee reece eereeees o6 
Macoma ocoyana Conrad........... TE Men a GANA OH Ob Alas 
Mactra montereyana Arnold.......06..seeeeceececcreeeee 
Meretrix decisa Conrad .........cccccrcccerecrecccscers 4 
Modiolus ynezanus Arnold .......-eceeseeeeecereeeceees x 
Mytilus inegensis Contad.........0eeeces eee e tence cece ees 
Mytilus mathewsoni Gabb, var. expansa INSU. Sub G00 
Nucula conradi Meek ..........eccescereres HO CGNs 
Ostrea eldridget Arnold .........cceeeeer cece eee encceee 
Pandora scapha Gabb .....+...sceeeeccce cs cceeeseecceers 
Periploma sanctaecrucis Arnold.........+s++eseceereeeees 
Pecten branneri Arnold .........cccccecccreccceecrseecee x 
Pecten hamlini Arnold ........sccceeeccccceeeeecseeceees : 
Pecten lompocensis Arnold.........seeeeeeeeseeeeesecees 
- Pecten magnolia. Conrad........c.eeeeeeeseeeeecereecceee 
Pecten nevadanus Conrad ........ccseeeeccccesceeccteees 
Pecten peckhami Gabb .........cseerecceceeecereeeeeeces x 
Pecten perrini Arnold..........cceeee eee ee eee cree neces 
Pecten propatulus Conrad ......-.eeeeeceeceecceeeeceeces 
Pecten sanctaecrugensis Arnold............eee eee eee eens x 
Pecten sespeensis Arnold.......ssceeeerccerccerceerccces 
Pecten sespeensis, var. hydei Arnold......--+++++e++-++e> 
Pecten stanfordensis Arnold........+..eeceeeeeeenceeeees 
Pecten vanvlecki Arnold........ccceececcccseeeerccrreeee 
Pecten vaughani Arnold..........eeceeeceeeeeerecereeees 
Saxidomus vaquerosensis Arnold ..........0+eeeeeeeeceee 
Septifer coalingaensis Arnold........+-+-seeeeee seer teres 
Tapes inezensis Conrad.......seececeeeeecr csc ecetetrcees 
Tellina congesta Conrad........ccceeee cere eee eeeecrecees 
Tellina oregonensis Conrad........seeeecescececscecerees 
Voldia impressa Conrad ..........eee cece esee creer eceeces x 
Voldia oregona Shumard............seeeceseeecescrecees 
Voldia submontereyensis Arnold.........+-seesseeeeeeees 
Voldia supramontereyensis Arnold..........+++++eeeeee eee 
Agasoma barkerianum Cooper ......s++scecereeeeeseeeces x 
Agasoma gravidum Gabb.......-.--eseeeecer err eeereeees 
Agasoma santacruzanum Arnold.......-+++++seeeeeeeees dj 
Agasoma sinuatum Gabb ....-.---+--+- eset 
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