18 Irregularities of the Floor of the, 



JVebrascensis, Chonetes 7iiesoloba, Ilemipronites crassus, 

 Spirifer plano-convexits, Athyris sublilita, Aviculopecten 

 Whitei (?), Nucula venlricosa, Nucula (?) anodontoides, 

 Nuculana bellislriala, Bellerophon Montfortianus, Bellero- 

 phon Stevensanus, Bellerophon percarinatus, Pleurotomaria 

 Grayvilliensis, Pleurotomaria carbonaria, and Nautilus occi- 

 dentalism together with many fragments of criuoidal stems. 

 On a small run entering the Beaver, about three miles above 

 New Brighton, the lower portion of this stratum is made up 

 almost entirely of Aviculopecten Whitei, and attached to 

 these shells are Spirorbis carbonarius in countless numbers. 

 The latter fossil occurs at this locality only. This shale 

 seems to disappear entirely where the overlying limestone 

 attains considerable thickness. 



In the Shale No. 3 are vast numbers of vegetable remains, 

 for the most part so imperfect that anything beyond mere 

 generic determination is impossible. 



The Tionesta Sandstone is a very hard, coarse, white 

 rock. It is quarried extensively at Homewood, by the 

 Pennsylvania Railroad Co. It is there fifty feet above the 

 river, but passes under the river opposite New Brighton. 



III. — Observations on some Irregidarities of the Floor of the 

 Goal Measures of Eastern Kentucky. 



By R. P. STEVENS. 



Read October 27, 1873. 



During a late trip to the Cumberland Mountains, I ap- 

 proached them via the Knoxville Branch of the Kentucky 

 Southern Railroad. 



At Mount Vernon, Rockcastle Co., and in that vicinity, the 

 sub-carboniferous limestone is 300 feet thick (by estimate). 

 Thence the railroad runs eastward to Rockcastle River, and 



