10 



Unger , Gen. et Spec. p. 74. 

 Sternb. Vers. II, p. 70, 

 G'6pp. Syst. jil. foss. p. 192. 



iMIVI.IITES MINERAL!!;, 



Lluid. lithoph. Brit, ichnog. j). 12, ^>/. 5. 

 OSMU>DA, 



Scheuchz. herb, dilnv. j). 48, ^^Z. 10, Jig. 3. 



Leaflet oblong-, acute at the apex, sub -cordate at 

 the base, — one half projecting beyond the other, — 

 about two inches long and an inch wide ; midrib very 

 prominent and apparently not attenuate; veins remark- 

 ably delicate and dichotomous. 



Our specimen consists of a single detached pinnule, 

 and is most beautifully defined. The apex, however, 

 is unfortunately wanting , but an impression in the ma- 

 trix indicates its exact contour. 



It will be observed that our specimen, which seems 

 referable to no other known species , possesses a sin- 

 gular developement of the base , — hitherto undescribed, 

 — an even margin and excessively fine venation. 



Distribution , in coal formation : — at Osnabriick, 

 Germany; in England; at Wilkesbarre, Pennsylvania. 



NEUROPTEKIS R OGER ^It KIMBALL. 

 PI. 1, fig. 2. 



This most remarkable fossil impression consists of a 

 pinnately five - foliolate , fourlobed leaf, — sessile and 

 cordate at the base. The leaflets are oblong - ovate ; 

 the sinuses are deep and of unequal length. The ve- 

 nation is very fine and furcated — distinctly dichoto- 

 mous ; the margin is very even. The midrib is moder- 

 ately distinct, and, as it recedes from the base, be- 



