50 



Trans. Acad. Sci. of St. Loui 



IS. 



Hudson 

 River 

 Period 



PORIFERA, COELENTEHATA 

 AND BRYOZOA 



Hindia parva? Ulrich 



Streptelasma corniculum? Hall 

 Lichenaria typa? W. and S. . 

 Rhinodictya sp. undet 



Brachiopoda 



Dalmanella subaequata Conrad . . . 

 DalmaneUa tesiudinaria Dalman . . 



Lingula sp. undet 



Orthis tricenaria Conrad 



Strophomena incurvata Slieppard . 



Zygospira recurvirostra Hall 



Zygospira nicolleti W. and S 



Pelecypoda 



Ctenodonta auburnensis n. sp . . . . 



Ctenodonta costata n. sp , 



Ctenodonta medialls Ulrich 



Ctenodordu nuf^ntu Hall 



Ctenodonta oviformis Ulrich 



Ctenodonta n. sp 



Cyrtodonta billingsi Ulrich 



Cyrtodonta sp. undet 



GoniopJiora carinata Conrad 



Modiolodon subrhomboideus n. sp. 



Modiolopsis expansa n. sp 



Modiolopsis sp. undet 



Paralldodus obliquusn. gen. and sp 



Ps'iloco7icha? sp. undet 



lihylima sp. undet 



Sphenolium sp. undet 



Whiteavesia subcarinata Ulrich... . 



Gastropoda 



ArchinaceUa. paldlijormis Hall . . 



Archinacella sp. undet 



Carinaropsis actua U. and S 



Carinaropsis phaleria Sardcson. . 

 Catuschisma typa n. gen. and sp. 

 Conradclla fimbriata IT. and S. . . 

 Cyrtolites reirorsus Ulrich 



X 



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6 t^ c 



■SP 



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a 

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'bD 

 o 



P^ 



o3 



03 



a 



03 



O 



X 

 X 



X 



X 

 X 

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X 

 X 



X 

 X 



X 

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 X 



X 



X 

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X 



X 



T 

 B 



X 



s 



BR 



SBT 

 SBT 

 SBT 



S 



TU 



S 

 TH 



SB 



S 

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SB 



BtoH 



T 

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BT 

 B-H 



BT 

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BT 



