44 
EXTINCT MONSTERS 
that they were the tracks of birds — a view which was not adopted . i 
by scientific men at the time, though afterwards many came i 
round to his opinion. We have perused his work with great 
interest, and cannot but admire the care with which he studied ,„ji 
I 
2 
Fig. 3. — Portion of a slab of New Red Sandstone, from Turner’s Falls, ,: ij 
Massachusetts, U.S., covered with numerous tracks, probably of Dinosaurs. 
This specimen is now in the Natural History Museum, London. The separate f 
tracks are indicated by the numbers. (After Hitchcock.) • • ij 
|J 
the tracks and endeavoured to interpret their meaning, although k | 
his conclusions now require a good deal of modification. I 
Professor Hitchcock chose to give fanciful names to the I'l 
creatures that made the tracks, such as Brontozoum giganteum, 
