

MARYLAND 



GEOLOGICAL 





SURVEY 

















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Sl'ECIES. 



LOCAL DISTRIBUTION. 



GENERAL DISTRIBUTION. 



Nanjemoy Formation. 





POTAPACO 

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WOODSTOCK 

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.MAKVLAND 

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MOLLUSCA. Velecypodu- Continued. 



'.^[(rrtl^ix orata var. ovata (Rog-ers) 



^Morfri.v ov(it<t car. ^lyiia Conrad 



Mrntrir suhiinpj-csiia Conrad 



/)ns//ii((jiNis lenticuhiiif! ( Kog-ers) 



I'intiic(tiili(i ?t')/)s Conrad 



.Dilihiiliiiita iiiarlbnrociisis C. & M 





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\LHciua dart on i Clai'k 



\Lncina uhleri Clark 











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Lucina sp 



Vencricardia iihinicii!<ta var. reu'ia Con.. 



YoKvicardia marylandica C. & M 



Vencricardia potajiavnrnsi!^ C. & M 



Cra.-tsatelJitcs alaetormis iConrad) 



Ci'assatelUtef: aiiuiaiia (Clarkj 



Cra^mtcUdes (dta (.Conrad) 



' Cra^gatcllitesi sp 



Astaitc maridaudica Clark 



CiiraUinpliaua brijani Clark 



Periiiloma .' sp 



Fliohidoiinia marijlandica Cou 



Modiolus alahameniiiff Aid 



Afodf'i/us marijUiiidtcus C. & M 



LithoplKUja iiiarjilandica C. & M 



Anomia marylandica C. & M 



Pccten choctavemiis Aldrich 



Pccten dalli Clark 



Pecten jolinsoni Clark 







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Ost rea compressiro>'tra Say 



Ostrca compressirostra var. alepidota Dall 



OMrea sellaeformi^ Conrad 



Ost)'f(( [Gryphaeotftrea) vomer (Morton) .. 



Orijphaea \'csicularis Lamarck 



Ptcria lunula (Conrad) 



Ghiciiineris idnneus: Conrad 



Triijonoarca decisa^ var. Con 



CucuUaea oiiiantea Conrad 



Leda pa rva ( Rogers) 



Leda cultelliformis (Rogers) 



Lcda improc'era CConradi 



-Leda pa riUs Conrad 



1 Leda parilis var 



! Leda potomacenaig C. & M 



' Lcda cUftonensis C. & M 



Leda tijson i C. & M 



Nucula ovula Lea 



NucuJa potomacen!<is C. & M 



MOLt^uscoiDEA. Brachiopoda. 



Terehi-atula harlaiti Morton 



Platidia marijlandica C. & M 



MotxuscoiDEA. Bryozoa. 



Diseosparsa varians t'lrich 



• Fascipora i^uhramn.^a Ulrich 



Rcfieulipora dichotnma G. & H 



Ca-aria dumosa Ulrich 



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' Harris : Bull. Amer. Pal., No. 4. 2 j 

 = Harris : Proc. Acad. N. Sci., Phila., 189. 



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