872 FLORAL ZONES OF THE POTTS VILLE FORMATION. 



[Lx. ]. fi'om Olio fonii of which the (liflVrentiatioii is iiardly more than 

 varietal in importaiico. 



Ki'i'iiioptrriH declp'teih'i differs from Krrinopfi'i'ix CJicKtluoiii^ typioally 

 represented in abundant material from Tracy City, Tennessee, by the 

 generally more distant and more distinctly cuneate lobes, which are 

 always crenulate-denticulate along the distal margin, b}' the rather 

 straighter nerves, and ))y the generally somewhat larger lobes of the 

 latter. ?J. Chenthaml^ which seems also to be present in the anthracite 

 region, occupies there, as is usually the case in other regions, a some- 

 what lower stage than the Pseudopecopteroid group. 



Tlu> species occurs at both the Lincoln mines, at the North Brookside 

 slope, n(>ar Good Spring, and at the prospect drift, near the mouth of 

 the upper Eur(>ka tunnel, as well as at several horizons in the Upper 

 Lykens (li\isioii at the Pottsville Gap. 



Makiopteris eremopteroides sp. nov. 



PI. GLXXXIX, Figs. 1. 2, 3, 3a. 



Frond (iua(lripartite(^). polypinnate, very large, rather dense; 

 primary ])innie large, very long, of unknown form, with lineate 

 rachis attaining a diameter of 1.5 cm. or more; secondary {'.) pinna? 

 altei-nate. open, often at a right angle to the rachis, close, sometimes 

 o\-erla))})ing nearly one-third their width, linear, or linear-lanceolate, 

 tai)(Ming to an acute apex, with rather slender, ventrall}^ concave, dor- 

 sally terete, very tinely lineate, slightly flexuose or flexuose-geniculate 

 rachis; penultiiuate pinna^ alternate, open nearly if not quite at a 

 right angle to the rachis, close, usually touching, or slightly overlap- 

 ping, ])ut sometim(>s. especially in the upper part of the pinna, a little 

 distant, lanceolate or linear-lanceolate, acute, hardly constricted at the 

 )>ase. slightly Hexuose-subgeniculate, the lower inferior pinna not .«pe- 

 <-ially heteromorphous: ultimate pinna> alternate, or sub-opposit(\ <)p<Mi, 

 often neai'ly at a right angle to the rachis, close, generally touching 

 or slightly overlapping, the smaller and basal ones triangular-ovate, 

 ine(iuilatei"ai, sometimes liroadly deltoid, compact, and l)ut little con- 

 stricted at the bas(\s. becoming lanc(>olate, somewhat acute, genei'ally 

 slightly subfalcat(>. the apices inclined upward, the rachis re )und-sulcate, 

 venti'a'.ly terete, dorsally mimitely lineate. and bordiM'ed by a nari'ow 

 wing (lecurring from the limb of the ])inmiles. 



I'inniiics alternate, very ot)li<|ue or neai'ly erect in the younger 

 ])innie. distinct to near the \\\)v\ of the largei' pinna', close, generally 

 ovate or rhomboidal. rarely ol)ovate, obtuse or (>])tusely roundiMl. the 

 upper ones connat<' foi" a little distance, the terminal ovate or ovate- 

 triangular. obtu>e. obscui'ely sublobate. the lower ones attached by 

 "\erv l>road. ol)li(|Ue. often pi'oduced bases, oidy the lowest lobed 

 ])innnles l)econiiiig pinnatilid. the\' beini;' naiTowly constricted at 



