SECTION IV., 1882. La tessa Trans. Roy. Soc. CANADA. 
Il.— On Some Ferruginous Concretions, from the Bed of Grand Lake, Nova Scotia. 
By THE Rev. D. HoONEYMAN, D.C.L. 
(Read May 25, 1882.) 
The author's attention was first called to these curious concretions some three years 
ago by a resident of the vicinity, who brought one of them to the Halifax Museum, stating 
that it was one of many, of various shapes and sizes, which could be seen lying on the 
bottom of the lake. Subsequently a number of specimens were secured. They all have 
an irregularly shaped mass of slate or sandstone for their centre or bottom, around which 
the ferruginous matter has been deposited in concentric lines. The outline of the stone, 
which is always exposed on the upper and under sides, appears, to some extent, to have 
determined the more or less circular form of the concretion. They occur both in flat and 
in saucer-shaped forms, the latter having a depth up to one and two-tenths of an inch. 
The largest specimens hitherto found do not exceed six inches in their larger diameter. 
A partial analysis showed the concentric layers, which present a granular structure, 
and are exceedingly friable, to consist of hydrous peroxide of iron, with traces of man- 
ganese. It would thus appear that a deposit of manganiferous bog iron-ore is now 
in process of formation over portions of the bed of Grand Lake. 
I cannot at present offer any satisfactory explanation of the causes which have deter- 
mined the peculiar saucer-shaped form of many of these interesting concretions, and which 
led some persons to imagine they were specimens of Indian pottery. 
I have much pleasure in presenting the specimen now exhibited to the Dominion 
Geological and Natural History Museum. 

IlI.—Cn Erosion from Ooast-Ice and Floating Ice in the Baie des Chaleurs. 
By R. CHALMERS. 
(Communicated by Dr. J. W. Dawson, May 25, 1883.) 
Mr. Chalmers describes the outcrops of the palæozoic rocks along the south side of the 
Baie des Chaleurs, as presenting a somewhat flat and even surface, not ordinarily marked 
with glacial striæ, up to a height of fifty to seventy-five feet above the sea-level. A similar 
appearance is presented by the beds below the sea-level along the coast. He connects this 
with the action of the floating ice, now very evident in the bay. In winter, a fixed border 
of ice is formed along the coast, from two to six feet thick, and extending for a distance of 
