GEOLOGICAL NOMENCLATURE 



regarded as equivalent to those in Lancaster township, New 

 Brunswick, described and held to be of Devonian age," adding 

 that several typical Horton fossils, such as Lepidodendron cor- 

 rugatum and Cyclopteris acadica are common to the Riversdale 

 and Union rocks and to the Devonian of New Brunswick. 



In the following year, however, he states that so far as the 

 faunas are concerned they clearly indicate a Carboniferous facies 

 for the New Brunswick Devonian, the rocks of Harrington 

 River, Parrsboro, Riversdale, Union and Horton Bluff. The 

 only proof adduced for this radical change, and the addition of 

 15,000 feet of strata beneath the Limestone to the already 

 enormously developed Carboniferous of Nova Scotia, is that of 

 certain fossils, assumed to have a definite range, in regard to 

 some of which he is surety mistaken. For " the protolimuloid 

 crustacean, usually referred to the Carboniferous system " is on 

 the contrary* also found associated with such characteristic 

 Lower Devonian forms as Pterygotus, Coccosteus, Pterichthys 

 and Glyptolepis ; Estheria is not " all the world over recognized 

 as Carboniferous " any more than Pterinea is peculiar to the 

 Devonian ; Leaia occurs in Pennsylvania in rocks regarded by 

 most geologists as Devonian ; and Professor Marsh has described; 

 from the Devonian, amphibians as highly developed as the 

 Dendrerpeton found by Sir William Logan at Horton Bluff in 

 1841 and by Dr. Ami, at Parrsboro in 1898, the affinities of 

 which the latter regards as Permian. 



Collections of fossil plants from these rocks in Nova Scotia 

 and New Brunswick were examined by Mr. David White of the 

 United States Geological Survey in 1898, and by Mr. R. 

 Kidston of Stirling, Scotland, in 1899, who came to almost 

 the same conclusions on perfectly independent grounds. Their 

 views are given at length by Dr. Whiteaves in his " Address on 

 the Devonian System in Canada." and may be thus summarized : 

 (1) The Horton series is nearly contemporaneous with the 

 Pocono formation of the eastern United States and the lower 



* Ottawa Naturalist for January, 1900, Vol. VIII, No. 10, p. 256. 



