DRAGONS OF OLD TIME 153 
which arrested the floating carcases (more or less decomposed) 
which had slowly drifted down the stream towards it. 
Diplodocus is almost the largest fossil reptile that has yet been 
discovered. From the illustration showing one of the hind limbs 
the reader probably surmises that Brontosaurus was a near 
relation, which is true. Certain bones, and a skull of the former, 
have been known for the last twenty years, but no one complete 
skeleton has ever been found. However, through the labours 
of Marsh, Hatcher, and Dr. W. J. Holland, enough material has 
been collected to build up a complete model or reconstruction 
Fia. 52.—Skull of Diplodocus. 
1. Side view. 2. Front view. 
of the skeleton of this truly wonderful giant reptile, as shown 
in Plate XXI. It is a cast in plaster-of-Paris—the gift of Mr. 
Andrew Carnegie, who, by his generous gifts, is doing much to 
further scientific researches in various directions. This model 
when first set up in the gallery devoted (chiefly) to modern 
reptiles attracted a great deal of attention. Not unnaturally, for 
it is so stupendous. <A reptile 844 feet long was something 
quite new to the public. This model is an exact copy of the 
original composite skeleton, to be seen in the Carnegie Museum, 
Pittsburgh. Each bone was cast in a separate mould made from 
