18 



form, — approximating, if anything, to attenuation in 

 its approach to the scars; — while our specimen ex- 

 hibits this rugosity as remarkably expanded in width 

 in the proximity of the scars. 



Besides the perfect agreement, in all other respects, 

 between Brongniart's figure and our impression, the 

 coincidence of locality is certainly worthy of considera- 

 tion , — the fossil prototype of his plate being from 

 Wilkesbarre, Pennsylvania: while ours, if not, with 

 certainty, attributable to the same mine, may safely be 

 attributed to the same local and geological formation. 



Locality , in coal formation : — at -Wilkesbarre, 

 Pennsylvania. 



SIGILLARIA ELLIPTICA, BRONG. 



Brong. Prodr. p. 65 ; Hist. i^eyiH. foss. I, p. 447, p/. 152, Jigs. 

 IS; pi. 163, Jig. 4. 



linger, Gen. et Spec. 2^- 237. 



Trunk longitudinally and strongly furrowed ; flutings 

 proportionately narrow , straight , parallel and equal ; 

 cicatrices depressed , (or elevated, according to the im- 

 pression,) approximatively discoid-ovate, ' (appearing as 

 if flattened in the smaller part of the periphery, and 

 laterally extended in the larger part, so as to render 

 the transverse axis nearly equal to the conjugate axis, 

 — besides giving the scar somewhat of a resemblance 



1 "Cortice laevi, cicatricibus discoideis valde approximatis 

 elliptico-sub-hexagonis , angulis obtusis rotundatis , inferioribus 

 magnis expressis, in carinas duas divergentes decurrentibus, sulco 

 transversali costai-um valde impresso." Brong. Hist, veget. foss. 

 ibid. 



