LIFE-ZONES IN THE BRITISH CARBONIFEROUS ROCKS. 231 
In the Midlands and Scotland P. gigantews occurs throughout the whole 
of the Carboniferous Limestone Series, which makes it doubtful whether 
there is any representative of the Tournai Limestone there. 
In a paper published in the ‘Geological Magazine,’ December 4, 
vol. v. p. 61, I referred to the anomalies of distribution throughout the 
Carboniferous deposits of Europe of the various species of Brachiopoda 
which have been stated to denote various horizons in Belgium and Russia. 
Owing to the deep trenching, necessary for the construction of a 
reservoir by the Derwent Valley Water Board in N. Derbyshire, an 
unusual opportunity was presented of examining the upper portion of the 
Pendleside Series, which consists mainly of dark laminated shales and 
thin sandstones. 
By the favour of Mr. E. Sandeman, M.Inst.C.E., we were enabled to 
inspect the sections and the material which was being excavated on a 
large scale, and to collect therefrom. 
The lower trench, where the work of excavation was mostly proceed- 
ing at the time, cuts at right angles the bottom of the valley of the 
river Derwent, a little to the south of Hollinclough Farm, and the 
following section was exposed at this point :— 
Fie. 1. 
ft. in. 
1. Shales 7% 0 
2. Grit 2 9 
RK“ 
8. Shales, with five thin grit bands . Re 4 6 
QA QQY 
si : 
5. Shales 29 
6. Grit vf 
7. Shale 4 0 
8. Grit 1.3 
9. Shale 3 0 
10. Grit 6 
11. Shale 5 
12, Grit 5 
13. Shale 
