Page:Geology and Mineralogy considered with reference to Natural Theology, 1837, volume 1.djvu/212

 208 yet been found that is common to any two great geological formations; or living in our present seas.

One important geological result has already attended the researches of M. Agassiz, viz. that the age and place of several formations hitherto unexplained by any other character, have been made clear by a knowledge of the fossil Fishes which they contain.

The voracious family of Sauroid, or Lizard-like Fishes, first claims our attention, and is highly important in the physiological consideration of the history of Fishes, as it