1877.J 4:{jO [Lesquereux. 



A mere catalogue of the names has been published in the first volume of 

 his first report, together with a reference to the group or geological 

 division indicated by these plants. The remarks then made on this sub- 

 ject have been confirmed by subsequent communications of specimens from 

 the same coal fields ; those of Mr. T. H. Aldrich, proprietor of the Monte- 

 vallo coal, and of Mr. Thos. Sharp, Superintendent of the Newcastle Com- 

 pany. 



Since my connection with the Second Geological Survey of Pennsyl- 

 vania explorations of the same kind have been pursued with renewed 

 activity, and these have been still more fruitful and more interesting than 

 those of old. They have greatly increased and multiplied the field of 

 researches, constantly adding new materials to those which were at 

 hand, and thus showing how great is the richness of the vegetation of the 

 coal, and how backwards we are yet in our acquaintance with it. We 

 have now a group of fossil plants from Clinton, Mo which, collected by 

 Dr. Britts in lower carboniferous very productive sliale, not only repre- 

 sents many new species, but, taken in the whole, affords a fair point of 

 comparison for the western lower coal measures. Another from the Can- 

 nelton Coal of Beaver county. Pa. (Coal C, of Lesley), where M. J. F. 

 Mansfield, the proprietor, has, at great expense of time and money, pur- 

 sued systematic explorations in the roof shales, which there hold re- 

 mains of plants in profusion. This local flora will become an important 

 representative of the vegetation of the middle part of the lower carbonifer- 

 ous. Prof. Worthen has sent a lot of plants, some of them of new and re- 

 markable types, from under the Chester Limestone of Western Illinois ; and 

 Prof. E. T. Con, anotiier not less interesting from the Whetstone grit 

 of Lidiana, which overlies the same sub-carboniferous formation. From 

 the same geologist I have had for determination a number of specimens of 

 fucoids, or remains of marine plants, very remarkable in their typical 

 relations, all discovered in the coal measures of Lidiana. Though these do 

 not belong to the Pennsylvania survey, and have been described in the 

 last report of Lidiana, they pertain, of course, to the Coal Flora. And more 

 still, we have received from Llinois a lot of specimens from the pseudo- 

 carboniferous, representing plants of the same characters as those discovered 

 by Prof E. B. Andrews in the Waverly Sandstone of Ohio. This com- 

 munication is due to Mr. S. H. Southwell, of Fort Byron, 111. who dis- 

 covered also at about the same horizon specimens of one of the species of 

 fucoids described in the Indiana report. 



Last fall I visited twice the sub-carboniferous coal beds around 

 Sharon and Youngstown, to ascertain the character of their vegetation, 

 and obtained valuable specimens, some of them of new species. I made 

 also a short tour of exploration in the basins of the Swatara river and 

 Raush creek to compare once more the plants of the Mammoth with those 

 of the Salem vein. Besides the specimens found by myself, a number of 

 others were then presented to the Survey by Mr. T. Price Wetherill, of 

 Tremont. Mr. W. Lorenz, Superintendent of the Philadelphia & Reading 



PROC. AMER. PHILOS. SOC. XVI. 99 2Y 



