108 



TRANSACTIONS OF THE 



South Hadley, Mass. ; Lepidodendron mamillare and 

 L. Cistii, Wilkesbarre ; Poacites lanceolata, Zanes- 

 ville, Ohio, and Pecopteris punctulata, Wilkesbarre. 



Those common to both countries as enumerated by 

 De la Beche, (Geological Manual,) are: — "Calamites, 

 three species ; Neuropteris, three species 5 Pecopteris, 

 four species ; Sigillaria, one species ; Sphenophyllum, 

 one species 5 Lepidodendron, three species ; Stigmaria, 

 two species j Andularia, two species ; Asterophyllites, 

 one species. 



Several eminent American authors have communi- 

 cated important information in this department of geo- 

 logy, in that highly valuable repository of American in- 

 telligence, the American Journal of Science. Among 

 others, we refer with much satisfaction to the labors of 

 Professors Silliman, Hitchcock and Eaton, and to 

 Messrs. G rammer and Cist. 



We refer our readers also, with great confidence, to 

 the accompanying memoir of Mr. R. C. Taylor, in the 

 present volume, for valuable information respecting the 

 geological position of a class of fossils, (Fuci,) which 

 have recently elicited much attention in this country. 

 Mr. T. has indicated several additional new species. 



Up to the period of the publication of the invaluable 

 work of M. Ad. Brongniart, ("Histoire des Vegetaux 

 Fossiles," 1828,) very little had been accomplished to- 

 wards the elucidation of this interesting portion of the 

 fossil flora. 



The opinions offered by this enlightened author rela- 

 tive to the geological relations of the fossil Fuci, of Eu- 



