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The Onondaga strata contain typical Onondaga 

 fossils as follows: — 



Corals 



Acervularia rugosa (E. and H.) 

 Favosites emmonsi, Rominger. 

 Favosites turbinatus, Billings. 

 Heliophyllum halli, E. and H. 

 Zaphrentis gigantea, Lesueur. 



Bryozoa 



Cystodictya gilberti (Meek.) 

 Fenestella parallela, Hall. 

 Fistulipora subcava (Hall.) 

 Monotrypa tenuis (Hall.) 



Brachipods 



Atrypa reticularis (Linnaeus.) 

 Atrypa spinosa, Hall. 

 Chonetes lineatus (Conrad.) 

 Cyrtina hamiltonensis, Hall. 

 Leptaena rhomboidalis (Wilckens.) 

 Pholidops patina, Hall and Clarke. 

 Pholidostrophia iowaensis (Owen.) 

 Productella spinulicosta, Hall. 

 Rhipidomella vanuxemi, Hall. 

 Schizophoria propinque, Hall. 

 Stropheodonta concava, Had. 

 Stropheodonta demissa (Conrad.) 

 Stropheodonta hemispherica, Hall. 

 Stropheodonta patersoni, Hall. 

 Stropheodonta perplana (Conrad.) 



Pelecypods 



Conocardium cuneus (Conrad.) 

 Paracyclas elliptica, Hall. 



Gastropods 



Platyceras carinatum, Hall. 

 Pleuronotus decewi (Billings.) 



Pteropods 



Tentaculites scalariformis, Hall. 

 Proetus crassimarginatus, Hall. 



Trilobites 



Proetus rowi (Green.) 



