AMERICAN PALEOZOIC INSECTS—IIAXDUllSCU. 667 



46. Fairplay, Colorado. Perino-Carboiiiferoui^. 



Tlie \Ac\nt and in.sect beds at Fairplay, referred by Doctor Sciidder to the 

 Triay, and by Lesqnereux to the Permian, can, on the evidence of the plants, 

 not be regarded as later than Permian, if indeed tliey are above the highest 

 Coal [Measnres. Autunian ? 



47. Sydney, Cape Breton. Middle Coal formation; AWegheny stage ? Upper 



Westphalian ? ( = "Yery lowest Productive Coal Measures, Sydney, Cape 

 Breton.") 



4S. Main Coal, East River, Pictou, Xova Scotia. Pennsylvanian; Stephanian ? 



49. St. John, New Brunswii'k. Little River group (Devonian ? ?). 



These plant l)eds were referred by Sir William Dawson to the Middle Devo- 

 nian and are regarded as of that age by most Canadian geologists, the stratig- 

 raphy of the beds being interpreted as conclusively indicating such a reference. 

 On the evidence of the fossil plants entirely, they ai-e i-(jnsidered by Mr. R. 

 Kidston and myself as certainly Carl)oniferous, and probably of Lower Coal 

 Measures (of Great Britain) or Pottsville (in America) age. 



The general geological and age relations of the insectiferoiis beds, 

 ,so far as these relations have been correlative I y ascertained, are shown 

 in the following table, in which the respective localities, when admit- 

 ting of approximate coi-rehition, are designated by numbers. (Excep- 

 tions are Nos. 10, 15, 18, 40-42, 46, 48, 4i».) 



David White. 



