[page] 549 interminable number of intermediate forms must have existed, linking together all the species in each group by gradations as fine as are our present varieties, it may be asked, why do we not see these linking forms all around us? why are not all organic beings blended together in an inextricable chaos?

This is all lower case. Can you fix that?
[page] 549 interminable number of intermediate forms must have existed, linking together all the species in each group by gradations as fine as are our present varieties, it may be asked, Why do we not see these linking forms all around us? Why are not all organic beings blended together in an inextricable chaos?