XIV. BULLETIN OF THE NATURAL HISTORY SOCIETY. 
Thus, of Cambrian rocks in the St. John Basin, taking the 
measurements where the structure is not too much complica- 
ted by faults and folds, and where the several members 
attains their greatest thickness, we have the following : 
Thickness in feet. 
Basal Series (Etcheminian) at Hanford Brook, St. Martins. 1,200 
Division 1 (Acadian) at the Alms House, Simonds, 650 
Division 2 (Jokannian) at King’s Square, Carleton, 1,000 
Division 3 (Bretonian) at Straight Shore, Portland, 700 
3,550 
The thickness of Division 2 is probably greater in the city 
than in Carleton ; it appears to be 2,000 feet, but there are 
no doubt folds in the. beds, not easily detected, that produce 
this great apparent thickness. 
Probably the whole thickness measured, where the several 
divisions show the greatest bulk, and including the Basal 
Series, would not fall far short of 4,000 feet. 
This is not equal to the thickness of the Welsh Cambrian 
rocks which is greatly increased by intercalated beds of 
volcanic ashes, etc. 
The faunas, or assemblages of animals in the St. John 
rocks, as shown by their remains, exhibit a remarkably close 
resemblance to those of Cambrian rocks around the Baltic 
Sea, though separated from them by the wide Atlantic. On 
the other hand they have very little resemblance to the Cam- 
brian faunas of the interior of America, though only a few 
hundred miles lie between. 
In the following table the species in each genus are 
arranged generally in the order of their antiquity, and the 
following abbreviations are used: — v— variety; sp. ^species; 
r=rare; cf=compare with; nar = narrow. Also for authors: 
L. = Linnreus. 
Ang. =* Angelin. 
Brog. = Brogger 
Eich. = Eichwald. 
Pand. = Pander. 
Wahl. = Wahlenberg. 
Lius. = J. Linnarsson. 
Where no reference is given the species have been described 
by the author in the volumes of the transactions of the Royal 
Society of Canada, or are unpublished. To the latter category 
belong Nos. 22,25,27, 35,36, 64a and b, 67, 77, 78, 79, 137, 140, 146. 
Htt. = C. F. Hartt. 
Dn. = Sir J. W. Dawson. 
Dav. = T. Davidson. 
Salt. = J. W. Salter. 
Hick. = Hy. Hicks. 
Wale. = C. D. Walcott. 
