44 DESCRIPTION OF FOSSIL TREES DISCOVERED 



of it, in the course of which they found the longitudinal sections to pre- 

 sent the peculiar markings which they consider essential to the genus Pini- 

 tes. They have named it Pittites Brandlingi, in honour of the proprietor 

 of the estate on which it was found. — See Fossil Flora, Plate I. p. 1. 



In Plate X. will be seen additional delineations of the tissue of this 

 plant. 



Fig. 1. Represents part of a transverse slice, similar to those of Plate 

 IX., but more highly magnified. 



Fig. 2. Represents part of a slice taken longitudinally and parallel to 

 the medullary rays. The reticular markings are similar to those already 

 described as characteristic of the genus Pinites. 



Fig. 3. Represents part of a slice taken in the longitudinal direction, 

 and parallel to the bark. Several sections of medullary rays are seen ; and 

 it is remarkable that almost all of these processes in this plant consist of 

 single series of cellules, and resemble those of the recent Conifers. 



FRAGMENT OF FOSSIL TREE FOUND AT HILL-TOP NEAR USHAW. 



This fossil, which is in almost every respect precisely similar to the last, 

 was found among the refuse of a quarry situated at Hill-Top near Ushaw, 

 about four miles north-west of Durham. This quarry is in a bed of sandstone 

 belonging to the upper part of the coal formation. Several fragments were 

 found, probably of different species, and of which one has been figured and 

 described in the " Fossil Flora" (PI. XXIII, XXIV.) under the name of 

 Pence Withami. The fragment here represented must be essentially dif- 

 ferent, for it presents the most decided characters of a true Pinites. 



Plate X. Fig. 4. Represents a portion of a transverse slice, which 

 differs in nothing essential from the Wideopen fossil tree. 



Fig. 5. Is taken from a very regular portion of a longitudinal slice 

 parallel to the medullary rays. The acute terminations of the elongated 

 cellules are seen ; and the walls are beautifully reticulated in two, three, or 

 sometimes four series. 



