Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 228
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- … ^^# The Skeleton of the Ichthtosaurus. bered shells called ammonites and belemnites, whichare so characteristic of the period preceding the creta-ceous, in Kke manner die with it.
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