PAL/EONTOGRAPH I CAL SOCIETY, I920 



olton , Insects of Coal Measures. 



PLATE X. 



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Eo&'^-zm 



it. 



let 



J W. Tu.tch.er , photo 



l.a,e.BOLTONITES. 2. TILLYARDIA. 



3. ARCHIMYLACRIS. 



London Stereoscopic Co. imp. 



