INDEX. 



427 



Broad mountain, in Bedford county, and of a coal vein in 



Perry county, Pennsylvania, .... 177 



Taylor, description of an ancient lake in Kishacoquillas valley, , 194 

 on the mineral basin or coal field of Blossburg, on the Tioga 



river, Tioga county, Pennsylvemia, . . . 204 



on the coal measures of Richmond, .... 275 



Taylor's creek, ........ 205 



Tennessee, appointment of Dr Troost state geologist, . . 168 

 Terebratula, . . . . . . . .249 



Tetracaulodon, ........ 51 



Theory of rain, hail, snow and the water spout, . . . 342 



Tioga river, ........ 204 



Transition strata of middle Tennessee, organic remains, . . 244 



coal or bituminous anthracite, description of, . . 177 



and secondary coal formations, relative position, . 177 



Travertin deposits of Virginia, ..... 328 



Triarthrus, ........ 105 



Beckii, .266 



Trilobite from Nova Scotia, . ^ . . . .37 



Trilobites, . . . . . . . .99 



Trichecus rosmarus, ....... 72 



Trimerus, . . . . . . . . 105 



Troost, on the localities in Tennessee in which the remains of the Mas- 

 todon, Mammoth and Megalonyx are found, . . 139 

 description of Pentremites Reinwardtii, a new fossil, witli re- 

 marks on the genus Pentremites of Say, . , . 224 

 description of Big Bone cave, formation of nitre, &c. continued, 236 

 description of a new species of fossil Asterias, . . 232 

 on some organic remains which characterize the upper transi- 

 tion in Tennessee, . . . . . 244 



letter from, giving a catalogue of transition fossils, . . 248 



Turbo bicarinatus, ....... 249 



Tussy mountain, . . . . . . . 184 



Unio subconstrictus, . . . . . . , 268 



United States appointment of G. W. Featherstonhaugh, U.S. geologist, 169 



Vegetable remains, fossil, from the Alleghany Portage, . . 256 

 Virginia gold region, . . . . . . 307, 317 



Warm Springs of Virginia, analytical notice of them, . . 169 



Walrus, . 72 



Whales, fossil, ........ 74 



Zea maize, fossil, found on the banks of the Ohio, . . . 414 



Zoophyta, ........ 269 



END OF VOL. I. 



