132 



THE GEOLOGIST, 



renoe, the state of Maine, the province of New Brunswick, and the 

 eastern coast of Labrador ; the whole extending between the latitude 

 of forty-two degrees and fifty-five degrees north, and longitude 

 fifty-six and ninety-eight west. 



The caverns of Canada may conveniently be divided into two 

 classes ; the first comprises those wliich are at the present time 

 washed by the waters of lakes, seas, and rivers, including arched, 

 perforated, fiovver-pot, and pillared rocks, which have at one time 

 formed the boundaries or walls of caverns, and all of them unques- 

 tionably the result of aqueous action. The second comprises caverns 

 and sul)terT*anean passages which are situated on diy land, and so far 

 as we know, not attributable to the same cause in their origin as 

 the first, or at least not applied in the same manner. 



In the first class are included the following : — 



1. Caverns on the shores of the Magdalen Islands. 



2. Caverns and arched rocks at Perce, Gaspe. 



3. Gothic arched recesses, Graspe Bay. 



4. The " Old Woman," or fiower-pot rock, at Cape Gaspe. 



5. Little River Caverns, Bay of Chaleur. 



G, Arched and flower-pot rocks of the Mingan Islands. 



7. Pillar sandstones, north coast of Gaspe. 



8. Niagara Caverns. 



9. Flower Pot Island, Lake Huron. 



10. Perforations and caverns af Michilimacinac, L. Huron. 



11. The Pictured Rocks, Lake Superior. 



12. St. Ignatius Caverns, Lake Superior. 



13. Pilasters of Mammelles, Lake Superior. 



14. Thunder Mountain and Pate Island Pilasters, L. Superior, 



In the second class are : — 



1-^. The Stcinhauer Cavern, Labrador, 



It"). 'J'hc basaltic caverns of Henley Island. 



17. Empty basaltic dykes of Mecattina. 



1^, Bigsby's Cavern, Murray Bay. 



10. Bunchettes Cavern, Kildare. 



20. Cibb's Cavern, Montreal. 



2L Probable caverns at Chatham, on the Ottawa. 



22, Cahiuhouns Cavern, Lanark, 



2:3. Quartz Cavern, Leeds, 



24. Probable caverns at Kingston, Lake Ontario. 



2^). Mono Cavern. 



2(>. Eraniosa Cavern. 



27. Cavern in the Bass Islands, L. Erie. 



28. Siil)UMTanean passages in the Great Manitoulin Island, Lake 



lluri)n. 



21). ]^[urrays Cavern and subterranean river, Ottawa. 



:>(). Pn)bablo e^ivenis in Iron Island, Lake Nipissing. 



