igoo] Ami — Devono- Carboniferous. 125 



Besides the above 15 Canadian so-called Devonian species 

 ecorded by Dr. White from the Pottsville formation in Pennsyl- 

 vania in his description of the species from the southern Anthracite 

 :oal field, he also records additional evidence, which in the writer's 

 udgment, points clearly to the view advocated in referring- the 

 Lancaster formation of New Brunswick with its abundant flora 

 Df ferns and with insects, etc., to the Carboniferous and not to the 

 Devonian System. 



(6, Annularia laxa, Dawson, sp. {^Asterophyllites laxus, Dawson*), 

 referred to in a subsequent paragraph, adds another species 

 to the list of forms common to the Pennsylvania Carbon- 

 iferous and the New Brunswick strata. 



In his summary of conclusions regarding the floral zones of 

 he Pottsville formation Dr. White devotes paragraph 14 to the 

 ollowing statement, which will be of special interest to the 

 students of systematic geology, not only of America, including 

 he United States and British North America, but also of Europe. 

 He thus writes : 



" The flora of the Pottsville formation is so far identical, in 

 DOth its genera and specific composition, with that from the sup- 

 posed Middle Devonian beds of St. John, New Brunswick, as to 

 eave no room for a great difference in the age of the latter. In 

 "act, the plants from the ' fern ledges ' include a flora essentially 

 equivalent to that of the Sewanee zone, which appears to be 

 epresented by a portion of the section at St. John." 



Such a statement, coming from so eminently qualified a 

 Avorker in and student of Palaeozoic floras, taken into considera- 

 :ion with the report of Mr. R. Kidston, of Sterling, Scotland, on 

 'ossil plants, from strata belonging to the Riversdale formation of 

 Mova Scotia (the recognized equivalent of the Lancaster forma- 

 tion of the New Brunswick "fern ledges ") compels me to re affirm 

 the statement made in the " Summary Report of the Director of 

 he Geological Survey Department for the year 1897" (p. 135), 

 that these formations " hold plants and animals which in their 

 broad general character resemble those of the Eastern American 

 Carboniferous." 



This statement was intended to convey the idea that the 

 Riversdale and Union formations had a Carboniferous facies and 



