OLD RED SANDSTONE. 
283 
Thus far we know little of the fossils of the Old Red, but, from the rich harvest of these 
cursory explorations, it may be expected that we shall yet bring to light a much greater 
number of species; and if we are not able to compare in number and singularity of forms 
with the fishes of this rock in Britain, we may, perhaps, discover others which will throw 
new interest around the investigations of the Old Red Sandstone. The Sauripteris, if I am 
correct in my inference regarding its structure, enables us to extend the sauroid type to a 
lower position than heretofore ; and from what has been remarked under the description of 
the lower rocks, we are now able to extend the evidences of the existence of fishes to a 
lower point in the system than has ever been previously done. 
