74 



THE EOCENE DEPOSITS OF MAKTLAND 





LOCAL DISTRIBUTION. 





Aquia Formation. 





PISCATAWAY STAGE. 



PASPOTANSA STAGE. 



SPECIES. 



d 

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Clifton Beach. 



Wades Bay. 



Leeland. 



Three miles west of Leeland. 



Collington. 



One mile N. B. of Grimesville. 



Three miles W. of Pisgah. 



u 



CD 



4J 



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d 



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$ 



d 

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p. 



Mattawoman Creek. 

 Upper Marlboro. 

 Hardesty. 



d 

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p 

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t-i , d 



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+= c 



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4J 



c;pQ 



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 3D 



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hi, 

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OQ 



.E 

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C 



CO 



3 

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Eeptilia. 

 Thecachampsci sp 















• * 





* 

 * 





•■••"• 

















•■ 







* . . 











'■'■ 











Thecachampsa sericodon ? Cope . . . 

















Thecacliampsa marylanclica Clark . 































1: * 

 1: ■ ■ 



• * 

 5 - • 

 f * 



f * 



• * 





* 

 * 



* 











* 









* 



* 

 * 



•• 



• • 



* 



* •• 



* ■ 



* • 



* • 



* ■ 



* • 



* ■ 















■• 







Pisces. 































1 



Synechodus clarkii V astman 



Odontaspis elegans (Agassiz) 



Odontaspis macrota (Agassiz) 



Odontaspis cuspidata (Agassiz) 



* 

 * 

 * 

















Carcharodon auriculatus (Bin.) 



Galeocerdo latidens Agassiz 



Sphyrna prisca Agassiz 



Xiphias 'i radiata (Clark) 



Arthropoda. Ostracoda. 

 Bythocypris suhaequata Ulrich .... 



Byihocypris parilis Ulrich 



Cytherella marlhoroeriKin Ulrich 



Cytherella submarginat.a Ulrich. . . . 



Cythere marylandica Ulrich 



Cythereis bassleri Ulrich 



Cytheridea perarcuata Ulrich 



MOLLUSCA. Cephalopoda. 



Hercoglogsa tuomeyi C. & M 



MoLLUSCA. Gastropoda. 







* 









;:i;; 

































































* 

 * 



* 

 * 



* 



* 

 * 



* 

 * 



* 

 * 

 * 



* 

 * 











Pleurotoma harrixi Clark 





































Pleurotoma potomacensis C. & M. . . 





























* 









Pleurotomci childreni Lea 





































Pleurotoma piscataverifiis C. & M. .. 

 Fh'iAi-dttiiiia tysoni C.& M 





























* 









Oiiici'lUD-in graciloidefi Aid. var — 



































* 





('niic('U<()ia %)otomacensis C. & M — 

 Olinilo sf, 



































* 

































* 







* 



* 

 * 

 * 



* 



* 



* 



* 

 * 



* 







* ■ 





















^'nl III il illirs sp 































Citiicilhi iiiirvJoideaf fConrad) 



Mitni nutfijldndivai Clark 















* * 



















* 

 * 







Mitid jjiiiiioiihriisis C. & M 





























* 

 * 







Latirus rruinild niiiriii< C. & M 































FunuH 'i suhl 1 II iiin 1 1 1 ' il ])rin 





































Fums ? intcisl i-iniu^ I leilprin 



Trophon nuhhrifi Harris 















* • • 















* 

 * 



•■ 







* 

 * 



















Strepsidura mihKCiiIoriiin Heilprin. 

 Melongena'i poto\n<ic6ni<is C. & M... 















• * 





















