CONTENTS, 



V 



gantic Mastodon and Megalonyx JefFersonii are found. 

 (Continued.) By G. Troost, M.D., <fec., . . 236 



8. Description of some Organic Remains characterizing the 



Strata of the Upper Transition which composes Middle 

 Tennessee. By G. Troost, M.D., &c., . • 244 



9. On the Organic Remains which characterize the Transition 



Series of the Valley of the Mississippi, &c. By G. 

 Troost, M.D., in a letter to Dr Harlan of Philadelphia 

 [Extracted from his manuscript Report to the Legislature 

 of Tennessee as Geologist of the State], . . 248 



10. Geological description of a portion of the Alleghany 

 Mountain, illustrated by drawings and specimens. By 

 Edward Miller, Civ. Eng 251 



11. Notice of Fossil Vegetable Remains from the Bituminous 

 Coal Measures of Pennsylvania, being a portion of the 

 illustrative specimens accompanying Mr Miller's Essay 

 or Geological section of the Alleghany Mountain, near 



the Portage Railway. By Richard Harlan, M.D., &c., 256 



12. Description of a new Fossil Plant from Pennsylvania of 

 the Genus Equisetum. By Richard Harlan, M.D., &c., 260 



13. Notice of Nondescript Trilobites, from the state of New 

 York, with some observations on the Genus Triarthrus, 

 &c. By Richard Harlan, M.D., &c., . . . 263 



14. Description of five new Species of Fossil Shells in the 

 collection presented by Mr Edward Miller to the Geolo- 

 gical Society. By T. A. Conrad, Hon. Mem. Geol. Soc. 

 Penns., &c., . 267 



15. Analysis of the Minerals accompanying Mr E. Miller's 

 Donation. By T. G. Clemson, Mem. Geol. Soc. Penns., 



&c 271 



16. Memoir of a section passing through the Bituminous Coal 

 Field near Richmond, in Virginia. By Richard C. Tay- 

 lor, F.G.S. Lond., &c., 275 



17. Analysis of some of the Coal from the Richmond Mines. 



By T. G. Clemson, Mem. Geol. Soc. Penns., &c. &c., 295 



18. Notice of a Geological Examination of the country be- 

 tween Fredericksburg and Winchester, in Virginia, in- 

 cluding the Gold Region. By Thomas G. Clemson, 

 Mem. Geol. Soc. Penns., &c. &c., . . . 298 



19. Review of Geological Phenomena, and the deductions 

 derivable therefrom, in two hundred and fifty miles of 

 sections in parts of Virginia and Maryland, Also notice 



