One important remark has been made, that a comparatively small variety of species is found in the older rocks, although of some particular ones the remains are very abundant...
p. 60 - Vestiges of the Natural History of Creation (1844)
One important remark has been made, that a comparatively small variety of species is found in the older rocks, although of some particular ones the remains are very abundant...
p. 60 - Vestiges of the Natural History of Creation (1844)