PilOCESS-BLOCKS AND OTHER ILLUSTRATIVE FIGURKS 

 BESIDES THOSE IN THE PLATES. 



Page 

 Fig. 1. Section in the northern face of the brickpit, Barnwell 



Station 6-7 



2. Curve representing the relative positions of the Cam and 



Lea- Valley Eloras 15 



1. Archimylacr is jjrmglei, s]). noY 21 



2. Archimylacris desaillyi 25 



3. Archimylacris lerichei 27 



1. Plan [of Clydach Vale and Gilfach Gocb] 32 



2. Ecology of plants, Eire-Foot Seain, Gilfach Goch 35 



3. Ecology of plants, Middle Yard Seam, Gilfach Goch ... 37 



4. Ecology ofplanls, Upper Yard Seaui, Gilfach Goch 39 



5. Ecology of plants, Nine-Foot Seam, Gilfach. Goch 41 



6. Ecology of plants, Six-Foot Seam, Gilfach Goch 43 



7. Ecology of plants, Two-Foot-Nine Seam, Clydach Vale . 45 



8. Ecology of plants, Pentre Seam, Gilfach Goch 47 



9. Ecology of plants, Abergorky Seam, Blaenclydach 49 



10. Ecology of plants, No. 3 Ehondda Seam 51 



- ^ 11. Ecology of plants, No. 2 Ehondda Seam, Gilfach Goch. . 53 



