878 FLORAL ZONES OF THE I'OTTSVILLE P^ORMATION. 



strong-ly apiculuti' })iniiul('s. the lUTVution beiiiii' clcarrr on the ventral 



SUl'fiU-O. 



This singular littlo species is nearly always found in a])undance asso- 

 ciated with Neuropteria Elrodi\j.^ AletJiopterls Lacoei^ and Sphenophyl- 

 hiiii tcnernmuni Ett. var. elongotion in the roof shales of Lykens 

 coal No. 2. It has been collected at the lower Eureka drift, the old 

 Lincoln mine, the New Lincoln niin(\ and at the corresponding horizon 

 in th(^ ty])e section at Pottsville. 



jVIarioptekis tennesseeana sp. nov. 



The fossils which I shall eventually describe in full as ^fnriopterh 

 iciincHHeeana comprise the unpublished Tennessee material included by 

 Lesquereux in PseudojMCopteris dimorpha. 



The comparison of the specimens from the horizon of the Sewanee 

 coal at Rockwood, Tennessee, and from the zone of Lykens coals Nos. 

 2 and 3 in the Southern Anthracite field, with the specimens from the 

 higher Coal Measures at Mount Hope, Rhode Island, and Oliphant, 

 Pennsylvania, which constitute the originals of the species, shows the 

 former to l)e undoubtedly specifically distinct. They are easily recog- 

 nized by the open, a little distant, constricted pinna.% and especially 

 by the obtuse or rounded piiuiules, generally ovate-triangular in form, 

 distinctly oblique, never constricted at the base except in the largest, 

 which are ])ecoming pinnatifid; and, though separated almost to the 

 base in the lower portion of the pinnte, they are seen to be more and 

 more broadly confluent in passing upward, blending in the obtusely 

 subl()})ate, usually rather l)lunt terminal portion of the piimse. The 

 Tennessee species is further distinguished by the not vei-y strong nerva- 

 tion, which is usually indistinct beneath the rathei- thick epidermis. 



This species occurs in its normal form or as a variety in the Sewanee 

 zone at the Lincoln mine and in the Pottsville Gap. 



SPHENOPTEKIS KaERCHERI S]). noV. 



Tnder this name I have descritu'd a fern which, in pinnation, size, 

 and general form and ai"i"angement of the pinnules vcmv cl()s(^ly i-(\s(Mn- 

 bles Ereinopter'lx iiil<-r(ij)/ii/ll(i i^i Lesijuereux, from IkiIs pi'esumal)iy 

 in the Sewanee zone at the ll(>lena mines in Alabama. The saliiMit 

 features of this species are the slender ])inn<e, the oblKjue, distant, 

 slightly irregular, soimnvhat Kremopteroid. often trifoliate pinnules, 

 and the moderately straight and nearly parallel nerves, which are oft(>n 

 concealed by the interneural striationof the somewhat inllated limb. 



The plant is found at both the Pottsville (Jap and at the Ne\N Lincoln 

 mine, where it is tissociated with Xna-optrris lumdl^ Sj)/,( iiojdii/l/inn 

 trnrrr'niniiii and Kr< uio/ffrr/s Jiucol nhirid^ species indicative of the hori- 

 zon of the roof of Lvkens cond No. '_!. 



