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BULLETIN OF THE NATURAL HISTORY SOCIETY. 
SO has seen the objects on which Sir William has based the genus 
Hylopus. 
The series of footmarks which are the type of H. Logani, are 
supposed by Sir William to have been made in soft mud by an 
animal partly water-borne, and they are decidedly ‘‘ digitigrade,” 
in some cases only the long middle toes scrape the surface of the 
A B 
Fig. 5.— Hylopus Hardingi, Dawson. A— Print of the hind and 
fore fopt, B— series of footprints, one-fourth of the 
natural size. 
mud, and were not impressed upon it, and in the most distinct 
only the toe-marks are preserved, hence the track is truly digiti- 
grade. But this is not the case with any of the other species ; 
all of them have the print of the sole of the foot preserved. 
The imperfection and irregularity of the track in H. Logani, 
which by Sir Wm. Dawson himself is said probably to be that of 
