WHITE.] FLORAS OF THE UPPER LYKENS DIVISION. 797 



In addition to the plants specially mentioned above, there remain a 

 nmnber of new species which are as yet unknown outside of the field, 

 and which, as may be observed in the table, occur only in this zone. 



The species enumerated above, which paleobotanists will at once 

 recognize as preponderantly conmion to the flora accompanying the 

 Sewanee coal in Tennessee,^ are essentially characteristic of this zone 

 of the Upper Lykens division. Many of them, such as Eremopteris 

 Cheatham.i, Marwpteris fennesseeana, Sphetwpterls Boyi, Sphenopteris 

 'pilosa, Alethopterk E^xinsii^ Neurojjteristennesseeana, CarpoUthes trans- 

 sectus, and WJdttleseya microphylla, have, so far as I know, never yet 

 been found at any considerable distance from this zone in the Appa- 

 lachian trough. 



The flora in the roof of Lykens coal No. 2 reveals, as compared with 

 that in the roof of No. 3, a slight dift'erence, consisting of the presence 

 of a few species of usually slightly higher occurrence and several forms 

 which, in the Southern Anthracite held, I have found at no other hori- 

 zon. As referable to the former category the following may be 

 mentioned: 



Eremopterisi decipiens. 

 Eremopteris dissecta. 

 Mariopteris pygm?ea. 

 Alethopteris Lacoei. 

 Alethopteris inagnifolia. 

 Neuro pterin Elrodi. 

 Neuropteris gigantea var. 



The peculiar elements which characterize the flora of Lykens coal No. 

 2 at every locality from which a considerable collection of specimens 

 has been obtained, and by which it would seem that, in the western 

 portion of the Southern Anthracite held, the horizon may almost 

 invariably be recognized, include Mariopteris pygmcea^ Sphenopteris 

 Lth man nl Alethopterk Lacoei, and Neuropteris Elrodi. To this group 

 of species may also be added Sphenophyllum tenerrimum var. elongatum^ 

 although in other flelds this species has a somewhat higher distribu- 

 tion, and such, we may anticipate, will be the case outside of a 

 restricted area in the western portion of the Southern Anthracite field. 

 It may b(i noted that even where drifted, at a point about 550 feet 

 below the Twin coal, above the wagon road on the east side of the gap 

 ])elow Pottsville, and at a point along an abandoned tramway near the 

 apex of the mountain on the west side of Westwood Gap, this horizon 

 reveals the same association of species in their identical forms. These 

 species appear to attend Lykens coal No. 2 in the Southern Anthracite 

 field, just as Eremopteris Cheathami, Spheiwpteris Boyi, S. palmatiloba, 

 S. pilom, Mariopterix temiesseeana, AletJiopteris Evansii and Neurop- 

 teris tennesseeana usually occur in the roof of Lykens coal No. 3. 



1 Coal Flora, Vol. Ill, p. 853. 



Asterophyllites arkansanus. 

 Sphenophyllum bifurcatuni. 

 Sphenophylluin tenerrieium var. elon- 



gatuiii. 

 Cardiocarpon Cuyahogse. 

 Whittleseya elegans. 



