OF THE FOSSIL PLANTS EXAMINED. 73 



3. Pinites Brandlingi. Lindley and Hutton. Fossil Flora, vol. I. 



p. I. 

 Walls of the elongated cellules reticulated with 2, 3, or 4 series of contigu- 

 ous aroleae. Medullary rays of one series of cellules. 



Plate IX. Figs. 1, 2, 3, 4, 5, 6. Plate X. Figs. 1, 2, 3, 4, 5, 6. Plate 

 XVI. Fig. 3. 

 Wideopen near Gosforth, five miles from Newcastle-upon-Tyne. Hill Top, 

 near Ushaw. Newbiggin, Northumberland. Westgate, near Newcastle, &c. 



4. Pinites ambiguus. 



Walls of the elongated cellules reticulated with 2 or 3 series of contiguous 

 areolae (in imperfect specimens, the areolae separated, and disposed in one or 

 two series). Medullary rays of 1-3 series of cellules. 

 Plate IX. Figs. 7, 8. Plate X. Figs. 7, 8, 9. 

 High Heworth near Gateshead, county of Durham. 



This species in the distorted parts resembles Peuce, but it is only when 

 the cellules are straight arid the areola? in one or two {never more) series, 

 that the fossil can be referred to that genus. 



5. Pinites carbonaceus. 



Characters not distinct, obtained from pieces of coal found in the mountain- 

 limestone series. 



Plate XL Figs. 6, 7, 8, 9. 



These genera, namely Pence, Pitus, and Pinites, evidently pass into each 

 other by a regular gradation, and therefore, in all probability, belong to the 

 same natural family. Peuce is obviously a Conifera, and the others differ 

 only in circumstances which do not seem to be very important. Thus 

 Peuce has the woody tissue very distinctly divided by concentric circles, 

 while in the other genera these circles are occasionally present, but more 

 frequently absent. In Peuce the pith is not larger than in our recent Co- 

 niferse, but in Pinites it is at least four times the size. The walls of the 



