10 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 1, 



tion is perceptible. The diameter of this canity varies from one-half 

 to one-third of that of the entire body, so that the wall which en- 

 closes it is from one-fourth to one-third of that diameter in thickness. 

 It is wholly composed of straight regular fibres, of even thickness, 

 radiating from the internal cavity to the external surface (see fig. 1). 

 The fibres have flat sides, and being closely packed together, they 

 are necessarily, on the average, hexagonal. On rubbing down a por- 

 tion of the external surface, the ends of these hexagonal fibres are 

 exposed to view. They do not appear to be tubular. 



In one specimen the extremities of these fibres are exhibited on 

 the external surface by numerous small dark-coloured dots on a pale 

 ground. Their outlines are here no longer hexagonal, but round or 

 oval, often confluent, with a tendency to form parallel lines, yet sub- 

 ject to some irregularity (see figs. 2, 3)*. A further notice, by Dr. 

 Hooker, of these curious fossils, and of a fragment of carbonized 

 wood found with them, is appended to this paper. 



Figs. 1, 2, & 3. Showing the structure of the globular vegetable 

 bodies found in the Ludlow Bone Bed. 



O 



la. 



Fig. 3. 



Fig. 1 a. Natural size. 



Fig, 1 b. Transverse section ; magnified. 



Fig. 2. Dotted markings on the external surface ; 



magnified. 

 Fig. 3. The same, more highly magnified. 



In crossing the axis of the Woolhope elevation from Gamage Ford 

 to Much Marcle, I again detected the Bone-bed, in the side of the 

 road, near the base of the Old Red Sandstone. It here presents nu- 

 merous rolled coprolitic fragments mixed with the supposed scales of 

 Thelodus parvidens, imbedded in brown micaceous sand. I also 

 noticed casts of an Atrypa in it. 



The beds of yellow sandstone quarried at Gorstley Common, be- 

 tween Woolhope and May Hill, belong to the same part of the series 

 as those which contain the Ludlow Bone-bed, though no remains of 



* The object figured in Sil. Syst. pi. 4. figs. 65, 66, and described as the " pa- 

 latal bone of Sclerodus," has every appearance of being one of these seed-like 

 bodies split in half. Somewhat similar, though imperfect, specimens were found 

 by Mr, Scobie and myself in the Cornstone of Llanfihangel, near Abergavenny. 



