DRAGONS OF OLD TIME 145 
But the most interesting opinion connected with this dis- 
covery is that the Anchisaurus was probably the creature 
that made some of the tracks found in the strata in which its 
remains were buried up (see chap. IL, p. 44). For half a 
century or more these tracks have been a fruitful source of con- 
tention, and now at last we seem to be literally “on the track ” 
of one of the many antediluvian creatures that made them. This 
is very satisfactory, and shows that time solves most things. 
Professor Marsh points out that, on a firm but moist beach, only 
three-toed impressions would have been left by the hind feet, and 
the tail could have been kept free from the ground. Ona soft 
muddy shore, the claw of the first toe of the hind foot would have 
left its mark, and perhaps the tail also might have touched the 
ground. As we have already remarked, such additional im- 
pressions have been found on the Connecticut Sandstones (see 
Plate I.). 
One other carnivorous Dinosaur, named Ammosaurus by Pro- 
fessor Marsh, and allied to the one above described, is also partly 
known in the same strata, but we cannot at present give any 
account of it. One or two other forms from Triassic strata are 
only imperfectly known; such as the Thecodontosaurus, from the 
Triassic conglomerate of Clifton, Bristol, and Zanclodon, from 
Germany and South Africa. 
Taking one consideration with another, there can be but little 
doubt that Dinosaurs flourished vigorously during the period of 
the New Red Sandstone. We have two kinds of evidence to con- 
firm such a conclusion; one is the large number and variety of 
footprints which they have left behind—although, of course, we 
cannot suppose that they were all made by Dinosaurs; for, as we 
have seen, some were probably due to tortoises, while others were 
probably made by Labyrinthodonts and perhaps even Anomodonts. 
L 
