HONETMAlSr — ON THE GEOLOGY OF NOVA SCOTIA, 38 



carboniferous conglomerate to the west, and skirting the other 

 Silurian area on the south, onward to James's River, the longi- 

 tudinal extent being about fifteen miles, and extends to the settle- 

 ment of lower South River, breadthwise across the harbor. These 

 have manifested the existence of reservoirs of brine and saliferous 

 clays, having a thickness of at least six hundred and ten feet. 

 This accounts for the existence of the salt pond to which I referred, 

 and on the origin of which I speculated in my paper on the Geolo- 

 gy of Antigonish County, vide Transactions of the Institute, YoL 

 2, Part 4. 



In this area, situate on the south side of Antigonishe Harbour, 

 there is a very interesting exposure of syenites and overlying lime- 

 stones, which want more than a passing notice. A plan of these, 

 which I made for the Geological Survey, coloured, presented a very 

 curious appearance. The two rocks conjointly form a noticeable hill 

 of the elevation of three hundred feet above the sea level, according 

 to Bayfield. On the summit the limestone is parted by the syenite : 

 the one and the other contending for the supremacy. The lime- 

 stone forms the summit rock ; the limestone is highly fossiliferous 

 throughout — the prevailing fossils are cyrtoceras, connularia, den- 

 tatiurn^ and leperditia, Leperditia Oheni is very abundant. 

 The limestone here has this fossil in common with the Windsor lime- 

 stones. I believe I found this organism in the Windsor limestones 

 prior to its discovery by Mr. Hart, and I identified it as the Leper- 

 ditia Okeni in the Hunterian Museum of the University of Glas- 

 gow in 1865. When I was Commissioner at the Dublin Exhibi- 

 tion, I found its representative in the fine collection of Leperditia and 

 other entomostraca belonging to Dr. Hunter, Curator of the Mu- 

 seum. An*other fact connected with the limestone in question ie, 

 that it does not appear to be affected by contact with the syenite, 

 in the way that the Oneida conglomerate of Arisaig has been affect- 

 ed by contact with the greenstone. In contact with the syenite, I 

 found the limestone and its fossils without the slightest appearance 

 of alteration. I collected specimens of connularia from the sum- 

 mit limestone in as good condition as any connularia that I had 

 met with. This shews unquestionably that the syenite is differ- 

 ent in its origin from greenstone, and also that the process of meta- 

 3 



