136 CATALOGUE OF FOSSIL PLANTS 



found in several of the large sandstone quarries of this neigh- 

 bourhood, as at Wideopen Quarry, Heworth Quarry, and in a 

 bed of sandstone on the coast near Newbiggin. Sections of these 

 trees have been described by "Withani in the Transactions of the 

 Natural History Society and by Lindley and Hutton in the 

 Fossil Flora. By most authors these large stems are referred to 

 the Coniferse. 



BHYTLDODENDBON, K Boulay. 



? Rhytidodendron minutifolium, K Boulay. 



Type — Bhytidodendron minutifolium, N. Boulay, 



Le Terr.Houil. duKbrddelaFrance,pl. 3,f. 1, Ibis. 

 Stem. 

 264. — Rhytidodendron minutifolium, Boulay? 



Part of a compressed or flattened stem about a foot in length 

 and one and a half inches broad, finely striated longitudinally, 

 with small triangular punctures or scars obliquely placed across 

 the stem from left to right upwards. The scars or punctures 

 of both sides visible, forming double sets of scars. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. — ). 



265. Part of a compressed stem about two inches in width. 



From the manner in which the minute leaf -scars are arranged 

 it would seem that both sides of the stem are represented, as 

 two scars are placed in some instances near each other, the 

 one raised and shewing the external appearance of the scar, 

 the other depressed and hollow, but retaining the triangular 

 form. The external surface finely striated longitudinally with 

 very minute striae. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H.C. 517). 



266. Small portion of bark of stem with distiuct, very small, 



triangular leaf-scars ; surface with long raised lines proceed- 

 ing from each scar downwards. Four to five inches long. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 520). 



267. Impression of the inner surface of cortex and a large 



branch-scar. The impression of the surface is wrinkled and 

 ornamented with small black dots quincuncially arranged. 

 The large branch-scar at first sight has the appearance of a 

 scar of Ulodendron. 

 Loc— Shale above the Bensham Seam, Jarrow. {H.C. — ). 



