242 MR. L. 13. STA.MP ON" TItE HIOHEST [vol. lxxiv, 



It is seen that the aggregate thickness of Upper Ludlow and 

 Temeside rocks in the Bucknell district far exceeds that recorded 

 in any other district within 50 miles. 



Finally, the examination of the area has shown that the greater 

 part of the ' Old Red Sandstone ' of the Survey maps must be 

 considered as belonging to the Temeside Shales, and that the extent, 

 if present, of true Old Ked Sandstone rocks in the Clun Forest is 

 very small. 1 



This paper would not he complete without a reference to the 

 zonal work carried out by Miss G. L. Elles & Miss I. L. Slater on 

 Upper Ludlow rocks. This investigation has confirmed, in every 

 particular, the classification adopted by these authors, and proved 

 the wisdom of their divisions, which have been found to hold good 

 also for the district west of the original area. Mr. W. W. King & 

 Mr. W. J. Lewis 2 have already shown this likewise to be the case 

 in an area far away to the north-east. 



In conclusion I wish to express my thanks to Dr. A. H. Cox, not 

 only for suggesting the work and for valuable assistance during 

 the course of the investigation, but also for reading through the 

 manuscript. Thanks are also due to Dr. W. T. Gordon, who has 

 facilitated in every way that part of the work which was carried 

 out in the Geological Department of King's College (University of 

 London), and who also read part of the manuscript. 



Note. — I have to acknowledge the kindness of Mr. W. W. Kingr 

 in calling my attention to a paper by himself and Mr. W. J. Lewis 3 

 published shortly after this paper was written. 



Fish-remains, indicating a Downtonian age, have been found in 

 the red shales that rest on the Temeside shales in South Stafford- 

 shire. This discovery modifies veiy greatly the thicknesses given 

 for Downtonian rocks of that area in the table (p. 241), and at 

 the same time throws doubt on the Old Red Sandstone age of the 

 rocks overlying the Temeside Shales in the Ludlow district. 



In the Clun Forest my original determination of the age of the 

 red sandstones occurring above Temeside Shales on Clun Hill rested 

 entirely on the correlation with the Ludlow district, the rocks not 

 being sufficiently exposed for careful examination. In the circum- 

 stances, therefore, it seems advisable to defer the attribution of a 

 definite age to these purplish-red sandstones, until a more extended 

 study can be undertaken. 



1 See C. Lap worth & W. W. Watts, 'Geology in the Field' Jubilee vol. 

 Geol. Assoc. (1910) p. 760, on the ' Old Red Sandstone ' of the Long Mountain. 

 See also note, above. 



2 Geol. Mag. dec. 5, vol. ix (19l2) pp. 437 et seqq. 



:i Proc. Birmingham Nat. Hist. & Phil. Soc. vol. xiv (1917) p. 90. 



