Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 227
we are led from one to the other bythe most gradual progress, if wefollow the course of Naturethrough the whole series of thoserelics of her operations which shehas left behind. And it is by the population ofthe chalk sea that the ancientand the modem inhabitants ofSkeleton of the the world are… … On a Piece of Chalk 199 swimming reptiles, the pterodactyl^ the ichthyosaurus,and the plesiosaurus, which are found in no later de-posits, but abounded in preceding ages. The cham-
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