WHITE] FLORAS OF THE UPPER LYKENS DIVISIOIST. 799 



distance along a thin coal, and in dark coaly shales Avhich contain 

 Mar!opfepi-'< pygim^^a^ AJethoptei'is Lacoei^ and Neuropteris Elrod'i in 

 the facies and association characteristic of the horizon of Lykens coal 

 No. 2 in the Lincoln district, and 1 have little hesitation in suggesting 

 the prol)able approximate contemporaneity, if not equivalence, of the 

 two beds. 



As previouslv mentioned, the same horizon appears also to have been 

 touched in a trial shaft on the west slope of Westwood Gap. 



Among the more interesting or important additional species in bed 

 J. the probable equivalent of this horizon in the type section in the rail- 

 road cut at Pottsville, which has been more thoroughly searched for 

 fossils, are Eremopterls Aldric/u', Sphenopferis palmafiloha, S, pllosa, 

 Pecopteris serrulata^ AlethopterU Evansii^ Callipteridhim pottsviUe)ise^ 

 and Keio'opteris hirsidina. Of these, the first three are usually rather 

 more conunon at a horizon a little higher than that of coal No. 3 in 

 other coal lields. Pecopteris serrulata^ which, if the specimen has 

 not been misplaced, occurs in the shales over coal No. -i at Brookside, 

 has hitherto been unknown at any distance below the zone of coals 

 Nos. 2 and 3. Callipteridium pottsiyillense is very close to a species 

 from the ''coal-bearing shales" of Washington County, Arkansas, 

 where it is associated, as in bed J, with a dilated, thin type derived 

 from Alethop)teris EvanslL The Neuropteris Mrsutina is a new species 

 with slender, acute, long-pointed pinnules, strongly suggesting Weu- 

 roj)teris Scheuchzerl^ to which it appears to sustain an ancestral relation. 

 It is the earliest-known hirsute A^europterk. 



The rather small number of plants from bed K is hardly worthy of 

 special consideration, since their source is only about 25 feet higher 

 than J, with whose flora the}' are in general agreement. It is, how- 

 ever, intei'esting to note the appearance at this level of an Erejnopjteris 

 {E. ffuhelegans) close to E. eJegans^ and a Sphenopteris {S. mixtilis) 

 pro])ably ancestral to the S. mixta of the Coal Measures. 



The flora of bed L, about 380 feet l)elow the Twin coal, like that 

 of Lykens coal No. 1, is one of the most interesting in the type 

 section on account of the antecedent Coal Measures forms mingled 

 with typical Pottsville types. In Calamites Roemeri, WJt!ttJeseya 

 CampjhMl^ and Carpolitlies orizceformis we seem to have survivors 

 from the Lower Lykens division, though it is possiljle that the name 

 Calamit'^s Suekoivii should be substituted for that flrst mentioned. 

 Omitting the enumeration of other species recorded from the Upper 

 Lykens horizons, at other localities, in the table, it may be observed 

 that, of the species present in bed L, Eremopterls dlssecta^ Marlopterls 

 PhilUpsi^ Annidaria Icdifolia,, Bothrodendvcm. arborescens^ Cordaian- 

 fhn.s sp/ici(fus\ and Cdrdiocarpon annulatum^ characteristic of the Potts- 

 ville formation in other regions as Avell, are unknown in the Lower 

 Coal Measures of the bituminous or anthracite basins of the Northern 



