igoo] Ami — Devono-Carboniferous. 123 



In the present volume and report by Dr. White, among- the 

 " Pottsville " plants described and recorded by him are noticed 

 quite an array of species characteristic of that formation, which 

 were however originally described from the "fern ledges" of 

 New Brunswick, andfor the most part, referred to the "Middle De- 

 vonian." This reference was very probably based more on apparent 

 metamorphic and petrographic grounds than for any other reason. 

 The importance of this finding of Dr. David White's cannot be 

 too strongly emphasized, and in calling attention to the forms in 

 common between the Pottsville formation and the Lancaster 

 formation, at this juncture, the writer presents it as an 

 additional argument in favour of the Carboniferous age of 

 the New Brunswick deposits known as the Mispeck Group, 

 Cordaites shales, " Fern ledges," the " Little River Group" the 

 " Dadoxylon sandstone" and the " Bloomsbury conglomerate." 

 The strata constituting these "fern ledges" containing a large 

 and abundant flora and fauna has been recently designated by the 

 writer as the Lancaster formation. 



The following species from the Pottsville formation of Penn- 

 sylvania also as identical or allied species in New Brunswick, 

 whilst a number of them have also been recorded from Nova 

 Scotia. 



1. Trigonocarpon Dawsoniaman, D. White. 



On page 910 Dr.White describes this new species and writes: 

 "it agrees so completely with the fragments figured by Dawson 

 from the ' fern ledges' at St. John as ' fruit or bracts of uncertain 

 nature,' that I have ventured to include a portion of the latter 

 material as well as the same species." Dr. White further adds : 

 " The figures given in the ' Devonian Flora' will serve to illustrate 

 the Pottsville material which I name in honour of the late distin- 

 guished Palaeontologist of America." 



2. Cardiocarpon obliqimm, Dawson.* 



3. Cardiocarpon cotnutuni^ Dawson.* 



4. Cardiocarpon Girtyi, D. White. (Allied to Cardiocarpon Bailey i, 



Dawson.)* 



*The species marked with an asterisk (*) were described by Sir William 

 Dawson in Q. J. G. S., Vol. XVIII, 1862, pp. 296-330, London, Eng. 



