IIov? is the Cambrian divided f — Matthew. 147 
" lp-ff=Mcnoviiin :uul Snlva, I'iirailoxiiloH fauna, 80 " , . 2.:{ 
" la-6=IIarlecli (?) or Oleiiellua fauna HO " . . . 2.3 
355 feet. 10.0 
In Wales there iirc the following groups of Cambrian strata: 
Ratio. 
fTrcmadoc 1000 feet, 1. 
Upper 1 Dolgelly GOO " .5 
Canihrian. 1 Ffe.^tiniog 2000 " ) ^ r 
[Maentwrog 2500 " \ **-^ 
T ( Menevian 700 " ) o c 
^^T^'" ]solva 1800 " -^ 
Cambrian. ^,^^^^^^. ^.^ . ^_^ 
10,100 10.0 
In Acadia the Cambrian sediments are intermediate in 
thickness between those of Wales and Norway. The average 
of two sections in the city of St. John gives the following pro- 
portions : 
Ratio. 
Division 3=Dolgeliy (and Tremadoc) 600 feet 2.5 
" 2=Ffestiniog and iSIiventwrog 1050 " 4.0 
" l = Meiievian and Solva 350 " 1.5 
Series A =Caerfai ( ? ) 500 " 2.0 
2500 10.0 
In Newfoundland Mr. Walcott has found the Olenus beds 
to be about 600 feet thick and the Paradoxides beds 370f feet, 
which agrees nearly with the thickness of these portions of 
the Cambrian system at St. John (New Brunswick). 
The Olenus fauna is found in Newfoundland, but apparently 
Mr. Walcott has not discovered there the fourth fauna (Pel- 
tura) or the fifth fauna. We therefore are still confined to the 
three countries of Scandinavia, Wales and Acadia as giving 
the most complete presentation of the sedimentation and life 
of the Cambrian period. Combining the ratios for these three 
countries we get the following result. 
General 
Norway. Wales. Acadia. Ratio. 
Fifth fauna Stage 3rt 1.2 1 l.*....l.l ) 
Fourth'- '• 2<f-c 1.0 5 1.5 .. . . 1.0 ,"- (>.^ ^I?P?*' 
Third " " 2a-c 3.2 4.5 4 3.9) Cambrian. 
Second" .. " Ic-J 2.3 2.5 1.5....2.1> , Lower 
First "... " lo-6 2.3 1.5 2 1.9 i "* 
10.0 10.0 10.0 10.0 
•The general average i.s taken for this portion. 
