Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 112
ost of the corals ofthe earher days have disappeared, but the molluskshave not changed more than they did at several differ-ent times in the earhest stages of the earths history. After the Trias comes a long succession of ages inwhich the life of the world is steadily advancing tohigher and higher… … Fig. 8. Ichthyosaurus and Plesiosaurus. reptiles. It is well named, for the kindred of the liz-ards then had the control of the land. There werethen none of our large fish to dispute their control, sothey shaped themselves to suit all the occupations thatcould give them a chance for a living. Some…
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