O. C. Marsh—American Jurassie Dinosaurs. 413 
The dorsal vertebrae have elongated neural spines, and deep 
cavities in the sides. They are distinctly opisthoccelous. There 
are four vertebree in the sacrum, all with cavities in the centra. 
Their transverse processes are vertical plates, with expanded 
ends. The anterior caudal vertebre are plano-concave, and 
nearly or quite solid. The tail was elongated, and the chevrons 
are similar to those in Crocodiles. 
position in which they were found. e humerus is very 
arge and massive, and its radial crest prominent. This bone 
with hoofs. In Plate VII, figure 1, the restoration of the 
scapular arch and entire fore limb of one species of Morosaurus, 
sacrum. The ilium is short and massive, and shows on its 
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