ii4 OF FOSSIL-SHELLS, &c. 



Another, the leaves longer, and in fomewhat bolder relief. 

 They are frequent in this mine. 



5. An elegant reticular impreffion of the bark of a nine, with 

 the leaves in pairs in each mam ; in iron-ftone, from the fame 

 mine. 



6. Another fmall reticular work, the maflies filled with a black 

 tfiining fubftance, the remains of fome refinous plant j in free- 

 ftone, from the fea-ftrand at Hartley. 



f. Another, the maflies fomewhat larger, in a concave nodule 

 of freeilone from the fhore of the brook at Simonburn. The maflies 

 are filled with the fame kind of ftone.- 



8. Another curious reticular work, in rhomboidal hollows, 

 pretty deep, in a ferrugenous nodule from Lee-Hall, upon North 

 Tyne. It is of the fame kind with that figured by the learned and 

 ingenious Da. Cofta, F. R. S. in the Philofophical Tranfactions (*). 



9. Another, in freeftone, the mafhes large, and the rhomboi- 

 dal hollows partly filled with ftojie, and a gloffy black fubftance, 

 with black wavy ftrise between them. The black fubftance and 

 lines feem to be the remains of a refinous bark, turned in bitumi- 

 nous earth to that colour. From Simonburn. 



10. Several orders of fmall polygonal cells, roundifh, inclin- 

 ing to oval, a fmall apex or point in the center, perforated, with 

 undulating lines between them ; in freeftone, from the fame 

 place. It feems to be the impreffion of the bark and leaves of" 



(i) Ph. Tr. vol. 5. part I. for 1757, artic. 28. p. 228. 



fome 



