172 Mr. R. Kidston on the Relationship) 



of the foliar bundles are exhibited so distinctly on their upper 

 portions. 



At b, fig. 10, the form of the leaf-scars is shown ; these 

 are represented natural size at fig. 10 6. This view likewise 

 shows the inne?' surface of the outer cortical layer, and only 

 gives a general idea of their form, which is rhomboidal. 

 Slightly above the centre the channel through which the foliar 

 vascular bundle has passed is indicated by a little " dot." 

 At d, fig. 10, is exhibited the Bothrodendron condition of the 

 fossil; this is represented natural size at fig. \0d. Here 

 all trace of the leaf-scar is obliterated, and nothing is left to 

 indicate its position except the little " dots " which mark the 

 channels of the foliar vascular bundles. 



At e, fig. 10, is seen the impression of the outer surface of 

 the stem. The form of the leaf-scars is not shown, as the 

 specimen has been thickly covered with foliage ; many of the 

 leaves are seen extending past the margins and apex of the 

 fossil. 



This specimen is very interesting as exhibiting the termi- 

 nation of a branch, and is, so far as I know, the only speci- 

 men extant which shows that characterv 



Hugh Miller refers to a similar example, but, unfortunately, 

 it has been lost *. The branch appears to have suddenly 

 terminated in a truncated or obtuse apex, to the very summit 

 of which were borne the Ulodendroid scars. 



Specimen No. 18. From the bituminous Oil Shales (Cal- 

 ciferous Sandstone Series). Collected by Dr. Macfarlane. 

 Pi. V. fig. 9 (nat. size). 



The specimen, of which the sketch is natural size, is about 

 4 inches high by about the same wide. On the left of the 

 plant are seen attached four of the upward directed appen- 

 dicular organs. These, as well as the stem, are covered by 

 foliage, but most of the leaves on the stem are broken ofi^, and 

 only their bases now remain attached to the leaf-scars. 



The leaves or bracts on the appendicular organs are closely 

 adpressed, and are best seen on that second from the base. 

 The appendicular organs are in so young a state of develop- 

 ment, that from any points they show it would be unsafe to 

 state definitely whether they are sessile or stalked cones ; but 

 I incline to the former view. A portion of the fossil towards 

 the lower part of the specimen has been removed, and on the 

 matrix is seen the impression of one of the Ulodendroid scars 

 of the opposite and corresponding row. From this we gather 

 that the full width of the specimen could not have been much 

 greater in its compressed state than 4 inches. The appendi- 

 « ' Testimony of the Rocks/ ed. 1857, pp. 462-464. 



