GEOLOGY OF SOUTHWESTERN IOWA 



87 



Meekella striatocostata. 

 Orthothetes crassa. 

 Productus cora. 

 Productus costatus. 

 Productus nebrascensis. 

 Productus punctatus. 

 Productus semireticulatus. 

 Pugnax uta. 

 Rhipidomella pecosi. 

 Seminula argentea. 

 Spirifer cameratus. 

 Pelecypoda — 



Aviculopecten occidentalis. 

 Aviculopecten whitei. 

 Edmondia nebrascensis. 



Entolium aviculatuin. 

 Leda bellistriata. 

 Myalina perattenuata. 

 Myalina subquadrata. 

 Myalina swallovi. 

 Parallelodon tenuistriatus. 

 Schizodus wheeleri. 

 Gastbopoda — 



Aclisina stevensana. 

 Bucanopsis marcouana. 

 Bucanopsis montfortiana. 

 Euompbalus catilloides. 

 Eupbemus carbonarius. 

 Pbanerotrenia grayvillensis. 



Nyman Coal Cap Rock Fauna. 



FOBAMINIFEBA — 



Fusulina secalica. 

 Bbyozoa — 



Rbombopora lepidodendroides. 

 Brachiopoda — 



Ambocoelia planoconvexa. 



Cbonetes granulifer. 



Enteletes bemiplicata. 



Marginifera longispina. 



Orthothetes crassa. 



Productus costatus. 



Productus semireticulatus. 



Pugnax uta. 



Seminula argentea. 



Spirifer cameratus. 

 Pelecypoda — 



Myalina subquadrata. 

 Gastbopoda — 



Euomphalus catilloides. 



Phanerotrema grayvillensis. 

 Trilobita — 



Griffithides scitula. 



Upper Limestoxe Fauna. 



Bryozoa — Pugnax uta. 



Rhombopora lepidodendroides. Pelecypoda— 

 Brachiopoda — Myalina swallovi. 



Ambocoelia planoconvexa. 



As many of the fossils collected at Stennett were found in the 

 debris of old quarries it is impossible to discriminate closely 

 between horizons. Those found in situ in the Braddyville and 

 Platte formations are listed separately. 



The species of Orthothetes differs from Orthothetes crassa 

 found in the shales associated with the Nodaway coal, as it is 

 much larger, with the dorsal valve more convex. It is doubtfully 

 identified as Orthothetes rohusta. 



