THE DESCRIPTION AND STRATIGKAPHIC RELATIONSHIPS. 411 



amount of iron present and not to a difference in structure. This species 

 was not al)undant, single, detached leaves usually being found. A whorl 

 of five leaves is shown in Plate I, Fig. 1. Locality: Yoho School. 



Sphttiophyllum cuneifolium (Sternb.) Zeiller. 

 PI. I, figs, 2, 3, 6; PI. II, fig. 3. 



1.S23. Rolidaria cuncfolium (Sternb.) Versuch, Fasc. 2. ]). 33, PI. XXVI, 



Figs. 4a, 4b. 

 1S86. Sphenophyllum cuneifolium (Sternb.) Zeiller, Fl. foss. Bas. houill. 



Valencienne, Atlas, PI. LXIII, Figs. 1, 3, 6, 7, 9, Text, (1888), p. 414. 



1899. Sphenophyllum cuneifolium (Sternb.) Zeill. White, David, Fossil 

 Flora of the Lower Coal Measures of Missouri. U. S. G. S. Mon. 

 37, pp. 174-177. 



1900. Sphenophyllum cuneifolium (Sternb.) White, David, The Strat. 

 Suec. Foss. Flora S. Anthracite Coal Field, Pa. U. S. G. S. 20th Ann. 

 Rep. Part 2, pp. 889- 890. 



1908. Sphenophyllum cuneifolium (Sternb.) Zeill. Sellards, E. H. Foss. 

 Plants Upper Pal. of Kans. Univ. Geol. Surv. Kans., Vol. IX, p. 

 426, PI. LI I, Fig. 4, 



This species was represented by two forms: (1) a form in which the 

 leaves are deeply dissected and (2) a form in which the leaves are not dis- 

 sected. The former type of leaf is narrow, with elongated, sharp teeth. 

 The bifurcation of the nerves occurs near the base. In pi. I, fig. 3 and in pi. 

 II, fig. 3, are shown leaves of this type. In the latter figure the dissection 

 extends almost to the base of the leaf. The other type of leaf is seven to ten 

 mm. in length and two mm. in width, slender, elongated and a little less 

 cuneate than the European form. The nervation arises from two nerves 

 which fork once near the base, either or both again dividing near the middle 

 of the leaf and sending veins to the four elongated, sharply-pointed teeth. 



Localities: Both types of leaf are common in the Yoho School locality. 

 The dissected variety only was found in the Liberty School locality. The 

 form with the leaves not dissected was found in concretions above the Upper 

 Block Coal at Asherville. 



LYCOPODALES 



Genus Lepidodendron Sternburg. 

 Lepidodendron Yohoense n. sp. 



PI. V. Fig. 6 



Bolsters eompai-atively large, broadly lanceolate in shape, marked by 

 fine transerse wo-inkles throughout their entire length; elongated and acum- 

 inate in opposite directions at the ends; separated by a prominent ridge 

 marked by fine transerse wrinkles; inside scar a little above the center, 

 rhomboidal, transersely elongated and slightly rounded above; vascular 



