236 MR. L. D. STAMP ON THE HIGHEST [vol. lxXlV, 



The rubbly shales are abundantly fossififerous in places, but 

 the fossils are mostly fragmentary casts of small lamellibranchs. 

 Other remains include fragments of Lingula cornea ; one or two 

 portions of Eurypterids ; JBeyrichia often abundant, and small oval 

 bodies about an eighth of an inch long, which may be ostracods 

 (Leperclitia) . 



The Temeside Shales retain their rubbly or concretionary 

 character in a vertical direction for about 250 feet, interrupted at 

 intervals by thin bands of greenish grit and micaceous sandstone, 

 but in the upper part they become more distinctly laminated and 

 pass into pale olive-green shales. No fossils have been obtained 

 from these upper shales, and the beds are seen only on Clun Hill in 

 the area mapped. In an old quarry on the southern slope of that 

 hill the shales, which are slightly micaceous, are well exposed. In 

 the upper part of the quarry there is a thin band of yellow sandstone 

 crowded with carbonized plant-fragments and Eurypterid remains. 

 Although a few feet of the olive-green shales succeed this sandstone- 

 band and the highest beds are not exposed, the top of the series 

 cannot be more than a few feet above the topmost beds in the 

 quarry, as fields a little higher up the hill are strewn with large 

 fragments of pale purplish-red sandstone, here designated the 

 lowest beds of the Old Red Sandstone (P). 1 Thus the band of 

 sandstone in the quarry corresponds very closely in nature and 

 position with the ' Fragment-Bed,' which has been taken as the 

 upper limit of the Silurian rocks in the Ludlow area. 2 Further 

 investigation in other parts of the Clun-Forest district will be 

 needed before a detailed account of the actual junction of Silurian 

 and Old Red Sandstone rocks can be given. 



. It will be noticed that, although the general succession of the 

 Temeside Shales is the same as at Ludlow, the beds in the area 

 considered are about three times as thick. The paucity of 

 Eurypterid and fish-remains in the greater part of these beds 

 (except in the sandstone-band near the top) is paralleled by the 

 absence of the Ludlow Bone-Bed in the Ludlow rocks, and by 

 the absence of fish-remains in the Platyscliisma Bands of the 

 Down ton- Castle Series. 



The examination of this area has shown that the greater part of 

 the rocks formerly mapped as Old Red Sandstone in the Clun 

 Forest must be removed to the Silurian, and that the area occupied 

 by true Old Red Sandstone rocks, if such be present, is very small. 8 



TV. Description of some Typical Sections. 

 (1) Near Bucknell Village. 



Although there is no good continuous section from the Upper 

 Ludlow through the Downton Beds on the east of the district, 



1 See note, p. 242. 



2 G. L. Elles & I. L. Slater, Q. J. G. S. vol. lxii (1906) p. 205, 



3 See note, p. 242. 



