4. NOTES ON CONCRETIONS 
They appear to be composed of cherty argillite, and are slightly 
calcareous, and some when broken through the centre show 
concentric layers, chiefly of pyrites. No distinct radiating 
structure, and no nuclei were seen in any of the specimens broken. 
6. In the Devonian rocks of Kettle Point, in Bosanquet, on 
Lake Huron, forms similar to the foregoing in outward appear- 
ance exhibit different internal structure. They are described in 
the Geology of Canada, 1863, p. p. 387-88, as: “ Peculiar spher- 
oidal concretions whose fancied resemblance to inverted kettles 
has probably given its name to the point. They vary in size 
from three inches to as many feet, and are sometimes nearly 
spherical, and others sometimes flattened, generally on the under 
side. Occasionally a smaller spheroidal mass is implanted on 
the top of a larger one. These concretions are readily broken, 
and are then seen to be composed of brown crystalline carbonate 
of lime, which is confusedly aggregated in the centre, and some- 
times contains blende. Around this are arranged slender 
prismatic crystals which extend from the nucleus to the circum- 
ference ; the whole having a radiating columnar structure, which, 
not less than the terminations of the prisms, at the surface of | 
the spheroidal masses, gives them very much the aspect of 
fossil corals ” 
7. The Upper Devonian fish and plant bearing beds of 
Scaumenac Bay, New Brunswick, are prolific in fossiliferous con- 
cretions, which are composed of calcareo-arenaceous rock, and 
take various forms according to the shape of the nucleus, which 
is often so well preserved that every bone can be seen. One of 
these concretions obtained by A. H. Foord measures over twenty- 
one inches in length, and contains the skeleton of a fish almost 
as long. It is Chirolepis Cunadensis (Whiteaves). In other 
concretions from this locality the writer and Mr. A. H. Foord 
found: Glyptolepis microlepidotus (Agassiz), Phaneroplewron 
curtum, Pterichthys Canadensis (Whiteaves), Husthenopteron 
Foordi, ete. 
In the coal bearing rocks of Skidegate Inlet of the Queen 
Charlotte Islands, conecretionary nodules are found, in which 
