Gyro. 



268 



5, fig. 10, from top (oolite) bed oi Burlington (Subcarbonifer- 

 ous) limestone at Burlington, Iowa. — XI. 



Gyroceras elrodi. Meyer. Collett's Indiana Report of 









■ '•;'.'\.'.v;-.:,-2p. 

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-'^'■■^'■•'-^'^M 





;e^),^^^:^•/;;.^.r^.;,,^■.:■-V■ -• ■•■^ • S-, • ;-\ -^..-y 



mmM^ 







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from J'cn Drnirlnr,^ h'j J. C. MvConnnll. ^O, 4 



1881, page 356, plates 37, 38, figs. 1, (a portion of the fine figure 

 bv J. C. McGonnell of Washington); fig. 2, 3, omitted ; 4. portion 



