275 



March 1869), but as I was unable then to give a detailed section, it may be 

 desirable t j add it now in descending order : — 



Feet In. 



1 Divided beds of Sandstone in their bands 2 



2 Dark brownish Shales 3 



3 Yellow Sandstone 1 6 



4 Olive Shales, brown and green, more or less indurated, 



but generally very brittle and sandy, slightly micaceous, 



and having an irregular fracture 5 



5 Thin bedded Sandstone , 5 



6 Olive Shales, often arenaceous, with a thin sandy layer at 



the base, similar in structure to No. 4 5 



Total 16 11 



I was only able to make out this section satisfactorily by the aid of a ladder. 

 The upper Sandstones thin out rapidly to the south-west, the olive Shales 

 rising to the surface, but too high up to be reached. 



The lowest stratum, No. 6, crops out at the north-west corner of the 

 quarry, and on the authority of a man who had formerly worked in it there is a 

 good, thick workable stratum of Yellow Sandstone underneath, though I could 

 see no trace of it. If this should prove correct it is probably the Downton 

 sandstone. All the Sandstones are more or less fossiliferous, and yield the usual 

 remains of carbonised plants and abundance of Lycopodites. The Crustacea 

 appear to be confined to the " Olive Shales," Nos. 4 and 6. I sent up all I pro- 

 cured to Mr. "Woodward and he informs me that the greater number belong to 

 Pterygotus Banksii, with the exception of a small tail. One specimen of this 

 genus consists of a considerable portion of the body ; the others are chiefly 

 fragments of the body, heads, tails, claws, and swimming feet. I was fortunate 

 enough to discover an entire and new species of Euryptcrus (see plate) which Mr. 

 Woodward has named Euryptcrus Brodiei, and described at the last meeting of 

 the British Association at Liverpool. It is perfect from the head to the apex 

 of the sharp pointed tail and measures 1% inches in length and 10 lines in the 

 broadest part of the body, and has a part of one of the swimming feet attached. 

 It is embedded in a yellow somewhat soft micaceous Sandstone connected with 

 the " Olive Shales." 



My friend Mr. "Woodward, of the British Museum, has favoured me with, 

 the following description of this new species of Eurypterus. 



