[^Opposite page 329, vol. xviii.] 



On the Floea of the Devonian Period in North-eastern America. 

 By J. W. Dawson, LL.D., F.G.S., Principal of M'Gill IJniversity, 

 Montreal. 



[Eead December 17, 1862, and printed in this volume by permission of the 



Council.] 



Appendix, September 1862. — In a recent visit to Perry, the au- 

 thor (with the aid of Mr. Brown, of that place) thoroughly examined 

 the present exposure of the plant-bearing bed. Among the speci- 

 mens obtained were the following. (1.) Wood of a conifer of the 

 genus Dadoxylon. (2.) A new Stigmaria of the type of S. exigua. 

 (3.) Specimens oi Lepidostrohus Richardsoni, showing it to have been 

 the fructification of a new and interesting species of Lycopodites. 

 (4.) Another species of Lycopodites allied to L. Erdmanni, Germar. 

 (5.) A new species probably of the genus Anarthrocanna, Goeppert. 

 (6.) A new Cordaites. (7.) More perfect specimens of Cydopteris 

 Browniana, showing it to have been a large and beautiful flabellate 

 leaf or frond, possibly identical with that from the Upper Devonian 

 of Pennsylvania, figured by Prof. Eogers, ' Pennsylvania Eeport,' 

 vol. ii. j)art 2. pi. 22. (8.) A Pern allied to Cydopteris Jadcsoni, 

 but with a stem similar to that of G. JRoemeriana, Goeppert. 

 (9.) New species of Sphenopteris, Tridiomanites, and Carpolites. 

 (10.) Specimens of Leptophloeum rhomhicum, showing its leaves and 

 fructification. These, with some interesting specimens recently col- 

 lected by Mr. R. Bell, of the Geological Survey, at Gaspe, Dr. Daw- 

 son hopes to describe in a future paper. 



Additional Note, October 23, 1862. — I am informed by Prof. 

 Hall, in a letter* bearing date Oct. 13th, 1862, that recent ob- 

 servations made by Prof. Orton, Mr. Way, and himself, indicate that 

 the beds which have afforded the plants noticed in this paper as from 

 the Catskill group of New York really belong to a somewhat lower 

 horizon, that of the Chemung group, while the Catskill group pro- 

 per, as now restricted by Prof. Hall, has not afiibrded any of these 

 fossils. 



This restriction renders it desirable that the following corrigenda 

 should be made in my paper : — 



Page 298, fine 2, for Catskill Group read Chemung and Portage G-roups. 

 „ „ line 7, dele Chemung Group. 



„ 307, line 2 from bottom, foot-note, for Catskill read Chemung. 

 „ 313, line 2, for Catskill read Chemung. 

 „ 315, line 14, /or Catskill Group read same group. 



„ 323, fine 22, for Base of the Catskill group read From the Middle Devo- 

 nian of. 

 „ „ line 29, for Catskill read Chemung. 



J. W. D. 



* See letter from Professor Hall to Dr. Dawson, on the corrected range of the 

 Catskill and Chemung groups in New York, in the Canad. Nat. and Geol. vol. vii. 

 No. 5, October 1862, p. 377. 



