644 SINGIQITES SHOU SH (GIBIGIN TUS, 
the rest of the digits. The vertebral column was strong with 
well developed neural processes on the dorsal vertebre which 
were further strengthened by ossified tendons that aided in mov- 
ing the heavy tail. The postpubis was long and extended back 
almost to the distal extremity of the ischium. The teeth were 
of the same type as the American forms, broad laterally, with 
serrated edges, and adapted to the trituration of vegetable food. 
There was no dermal armor as far as known but it is possible 
that there were small bony ossicles developed in the skin. The 
animal reached a length of thirty feet in the largest genus and 
about half of that inthe smallest. It is known from the Wealden 
of England and France, the most important deposit, however, is 
from the same horizon in the neighborhood of Bernissart, in Bel- 
gium, from which region a large number of skeletons have been 
taken, the majority of them in a very perfect state of preservation. 
A description of the Dinosaurs would not be complete with- 
out some mention of the fossil tracks in the Triassic sandstones 
of the eastern part of the United States. These are typically 
developed in the rocks of the Newark group in the valley of the 
Connecticut River, and are also found in these same rocks 
where they appear in Pennsylvania, Virginia, and North Carolina. 
A very large number of these impressions have been taken from 
the Connecticut region, and over a hundred separate species 
have been named from them. They are almost all three-toed 
forms and range from about an inch in length to over a foot. 
They are found associated with amphibian tracks. The course 
of the tracks may, in some instances, be traced for many feet or 
yards, and the length of stride and the character of the feet of 
the two sides can be clearly made out. The majority of the 
impressions show that the animals walked on the hind feet most 
of the time, only occasional traces of the front feet being found. 
In some cases a long groovelike track indicates where the tail 
of the animal was dragged through the mud. Because of the 
three-toed character of the tracks and the peculiar resemblance 
to the tracks of birds they were originally described by Hitch- 
cock as bird tracks (Ornithichnites). 
