262 Geological Remarks on the Lake Regions. 
cies. There is nota single shell inthe Strontian deposits of 
Grosse isle—and neither shell nor Strontian in the floor of the 
contiguous river, while the extensive quarries two miles be- 
hind Amherstburgh produce an immense variety of organic 
remains, animal and vegetable, without a vestige of the rare 
crystallizations of Grosse Isle.* __ 
JOHN J. BIGSBY, M. D. 
4, Geological Remarks on the Lake regions’; from a letter 
of December 6, 1821, addressed to the Editor by Major 
DevaFriELp. 
erals and geology ; and hasit in his power to impart m 
information to those who wish to pursue the analogy be- 
tween American and European Geology. I do not doubt 
his exertions will prove of interest and value. 2 
Perhaps your friend, who forwarded Mr. Buckland’s let- 
ter, would like to know that the Trilobite is found in the 
e Huron lime stone. | 
* The mineralogical sketch of Moss Island is to be cons 
idered.as only DY 
personal observations. Ina studied description of that district, 1 should em 
body the remarks of Douglass and Bird. 
