THE DESCRIPTION AND STRATIQRAPHIC RELATIONSHIPS. 407 



While a few of those plants have a rather extensive vertical range, by far 

 the greater number of them are plants that are confined to the Potts ville, 

 among which may be mentioned Sphenophyllum cuneifolium, S. tenue, Sphen- 

 enopteris inequilateralis, S. communis, Mariopteris decipiens, M. muricata, 

 Neuropteris Elrodi, Alethopieris Evansii, A. grandifolia, Odontopteris Neiv- 

 berryi, Cardiocarpon annulatum, and C. pachyteslum, forms that are character- 

 istic of the upper part of the Middle Pottsville of the type section or of 

 horizons in Ohio (Sharon coal?), Tennessee (Sewanee coal), Arkansas ("the 

 coal bearing shales"), and West Virginia (Sewell) that are approximately of 

 the same age.'^ Prom the evidence of the fossils it would appear that the 

 Pennsylvanian as represented in the Yoho School locality would fall some- 

 where in the upper part of the middle Pottsville. 



Plants found at the Cincinnati locality are as follows: 



Calamites Suckowi Brongn. 

 Lepidodendron clypeatum Lx. 

 Cardiocarpon bicuspidatum? (Sternb.) Newb. 

 Trigonicarpum ovatum n. sp. 

 Trigonocarpum hexagonale n. sp. 

 Trigonocarpum hexacostatum n. sp. 



Definite correlation cannot be drawn from the meager flora from this 

 locality. C. Suckowi and L. clypeatum have an extensive vertical range 

 and the range of the three new species of Trigonocarpum is not known. 

 G. bicuspidatum would indicate an age somewhat near that of the Yoho School 

 locality. 



The Clay City Quadrangle includes parts of Owen, Clay and Putnam 

 counties. The fossil plants obtained from this Quadrangle were all found 

 in the northeastern quarter of the Quadrangle and immediate vicinity. 

 Plants were obtained from the following localities: (1) From a "black jack" 

 layer over a thin coal in the creek bank, near the section line between sections 

 18 and 19, T 11 N, R 5 W, about one half mile east of BowHng Green; (2) 

 From shales overlying the Lower Block Coal in a drift mine in a ravine, on 

 the east side of the road, two miles north of the Roadman School, in the 

 southwest corner of section 1, T 12 N, R 6 W; (3) From a sandstone overlying 

 the horizon of the Lower Block Coal, in the creek about one fourth mile 

 north of Liberty School, in the north central part of section 31, T 12 N, R 5 

 W; (4) From the fire clay under the Upper Block Coal, in the creek bank, 

 about one fourth mile northwest of Asherville, in section 15, T 12 N, R 6 W; 

 (5) From hard sandy shales over the Lower Block Coal at Sehroepferman's 

 mine, in the east part of section 4, T 12 N, R 6 W; (6) From shales over the 

 Upper Block Coal at Baird's mine, in the east part of section 5, T 12 N, R 6 

 W; (7) From a plant-bearing sandstone in the Pennsylvanian, about one 



' 20th An. Rep. U. S. G. S. Part II, pp. S16-817, 1900. 



