NATIVES AND ALIENS 341 
one single fact in this illustration from the introduction, which 
outlines the method of analysis used in the work, is true to nature 
yo Re proc ess of. oe ae the ditches and remodelling the 
‘hedge’ banks,” presumably was meant, but this has the mor 
he 
mighty easy work ; pins ae facts painfully slow. Here on are 
for this case, for album has not defeated my analysis as some 
species have up to now. The soil is light and Boh: under hedges, 
mice, voles, worms, &c., work them ae When the 
summer’s burning heat or Sate s frost grips the open unshaded 
and unprotected ground animal life is driven to the cover of the 
hedges. Agropyron repens, which infests most hedges, however 
plentiful it may be in tilth disappears when an uncleaned field is 
” 
away to the hedges, es anyone will allow there is competition 
"The plant selected by Mr. Dunn for the purpose of illustrating 
his theory is the perennial Lamium album. My arranged rock- 
soil notes on this species number two hundred and twenty-five 
sheets, taken off the following twenty-eight soils and pocwrisatising 
The compound soils I shall ignore here as beside my purpose 
Sorts. 
i. Blown sand. ...........% 5 , 15. Lower lias clay ......... 6 
2. Chalky boulder clay... 35 | 16. Marlstone ............... il 
O. ORO eae 3 | 17. Middle lias clay caine 2 
4. Estuarine alluvium ... 13 | 18. Old river gravel......... £ 
5. Fen hic ckedin ies Bt oe, (RIOR CIBY | oc cices evens 17 
6. Freshwater alluvium... 16 | 20. Peat 6 
7. Hessle boulder clay ... 1 | 21. Purple boulder clay ...° 9 
8. Hibaldstow limestone 7 | 22. Rhetie shale............ 1 
9. Keuper marl ............ 4 | 23. River gravel ............ 4 
10. Kellaways rock ......... 2 | 24. Sandy glacial gravel... 43 
11. Kimeridge clay ......... 5 | 25. Spilsby sandstone...... 4 
2. Kirton limestone ...... 7.| 26. Tealby: clay... <ciiesscco- 
13. Lincolnshire limestone 8 | 27. Upper chalk ............ 3 
14. Lower chalk ............ 3 | 28. Upper lias clay ......... 2 
