120 REPORTS ON THE STATE OF SCIENCE. 



These excavations (Nos. 30 to 35) serve to show that the Lower 

 Comley sandstone occupies the north-western slope of Robin's Tump; 

 that the beds have a general easterly dip, but that this does not remain 

 constant throughout ; and further that, in addition to the calcareous 

 bands at the top, the group contains at least one fossiliferous band. 

 From a section plotted to a natural scale along a line up the north-west 

 slope, it appears that this fossiliferous band is approximately 150 feet 

 below the top of the sandstone of the summit, but it is impossible to say 

 whether this estimate of thickness is vitiated by faulting or repetition 

 of beds. 



Excavations 36 to 40, in the comparatively flat area immediately north 



of Robin's Tump. 



Openings were made at the places marked in order to ascertain, if 

 possible, the cause of the complete, change of surface characters 

 exhibited in passing from the steep and dry slopes of Robin's Tump to 

 the flatter and rather wet space to the north of it, but with no very 

 definite result. • 



No. 36, in the northern bank of the stream, showed soft greenish 

 sandstone, with a clip parallel to that of No. 30. 



No. 37, though pushed down to a depth of 5 feet, produced nothing 

 but broken sandstone of the same type. 



No. 38 was sunk to a depth of 4 feet, and yielded clayey material, 

 with a few pieces of the sandstone. 



No. 39 was deepened to 5 feet in a dry soil containing many frag- 

 ments of the same kind of rock. 



No. 40 produced nothing but surface clay. 



These excavations, coupled with the surface features and the exist- 

 ence of springs in the ground to the west and south-west, suggest the 

 occurrence of a set of thin bedded sandstones and shales below the moi'e 

 compact sandstones of Robin's Tump. 



General Summary of the Excavations of 1907-08-09. 



The funds originally supplied by the Committee appointed at the 

 Leicester Meeting being now exhausted, it seems advisable to gather 

 together the principal results of the excavations in one statement : — 



1. The line between the Paradoxides-be&ring Quarry Ridge grits and 

 the Olenellus -bearing Lower Comley sandstone is proved to be marked 

 by an unconformity. 



2. Below this line the Lower Comley sandstone has been opened 

 up at several places, and has been proved to contain fossiliferous bands 

 at various distinct horizons. The thickness of the whole group appears 

 to reach to several hundreds of feet, and its lower members pass by 

 gradations into the Wrekin quartzite. 



3. The Wrekin quartzite has been opened at two places, and is found 

 to consist of beds of quartzite of very varying thicknesses, with shaley 

 partings. 



i. Just above the (previously known) horizon of Olenellus (JJolniia) 



