BOSTON 



JOURNAL OF NATURAL HISTORY- 



VOLUME VI. — NO. IV. 



Art. XXV. — New Species of Fossil Plants, from the An- 

 thracite and Bituminous Coal-fields of Pennsylvania ; 

 collected and described by Leo Lesqjjereux. With 

 Introductory Observations by Henry Darwin Rogers. 



The following new species of fossil plants, one hundred and 

 ten in number, are some of the results of a systematic investi- 

 gation of the fossil flora of the carboniferous strata of Penn- 

 sylvania and the adjacent coal-fields of Olhio and Virginia, 

 undertaken three years ago by my able assistant in this de- 

 partment of the geological survey of Pennsylvania, Leo Les- 

 quereux, Esq., formerly of Switzerland, now of Columbus, 

 Ohio. 



By far the greater part of the specimens were collected by 

 himself, and these are now in our possession. A few of the 

 new species were first seen and studied by him in the rich 

 local cabinets of Mr. Clarkson, of Carbondale, and of the Rev. 

 W. Moore, of Greensburg, to whom our best thanks are due 

 for their liberality in thus opening their collections for the de- 

 scription of what was new. Many of these hitherto unde- 

 scribed forms were discovered in the slates, associated with the 



JOURNAL B. S. N. H. 53 AUGUST, 1854. 



