are given below for comparison with the previous table. The cycles 
of erosion are numbered in descending order of age. The figures 
represent differences in feet between succeeding levels. Queries to 
figures 
indicate a possible 
error of a foot, while 
queries 
alone indi- 
cate that the necessary levels are not developed 
in the 
particular 
profile. 
Guildford. 
Albion 
Upper 
Town. 
Swan. 
Helena. Swan. 
Swan. 
Swan. 
a. 
b. a. b. 
1 
? 
7 15 15 
9 
5 ? 
2 
? 
13 8 ? 8 ? 
30 
33 ? 
3 
... ... 7 
? ? ? 
5 
? 
4 
1 
::: } • 
? ? ? 
9 ? 
? 
2 
2 
::: } » 
19 23 ? 23 ? 
39 
39 ? 
3 
3 
::: } - 
? ? ? 
35 ? 
? 
4 
2 
::: } ■■ 
V ? ? 
14 ? 
9 
4 
9 
22 21 ? 21 ? 
44 
53 
Correlation with the 
Features of “ Uplift .. 3 - — 
The differences in 
height 
between the levels 
of rejuvenation in the 
Guildford District 
(believed to have been in 
the vicinity of base-leve 
1 throughout), and 
Levels. 
Guildford to West Midland... 
West Midland to Helena 
Helena to Present 
Difference 
in Height. 
ft. 
8 
7 
7 
Movement. 
ft. 
8 
15 
22 
In the Perth District and the Lower Swan the details of the 
features of uplift described by Somerville (16), if tabulated, are 
found to fall into three clearly marked groups, their heights above 
present high water level lying between the following limits: — 
First Group ... ... ... ... ... 1ft. to 7ft. 
Second Group ... ... ... ... 7ft. to 15ft. 
Third Group ... ... ... ... ... loft, to 23ft. 
The reader is referred to Somerville’s figures and map for the de- 
tails. Xow, it seems evident from the above tables, that the cycles 
of erosion which we have defined are expressed further afield, and 
we correlate the third group of the features Somerville has de- 
scribed with the West Midland cycle. This will include the shell 
beds of Minim Cove and Peppermint Grove, the “raised” beach 
and shell beds of the Coombe, the “raised” beach of Blaekwall Reach, 
the Crawley-Nedlands “raised” spit, and (though not described by 
