IMPRESSIONS OB/ THE PAST 39 



called Anomcepus, witl/ their accompanying 

 short fore feet, mark where some Dinosaur 

 squatted down to rest or progressed slowly on 

 all-fours, as does the kangaroo when feeding 

 quietly;* and we interpret the curious heart- 

 shaped depression sometimes seen back of the 

 feet, not as the mark of a stubby tail, but as 

 made by the ends of the slender pubes, bones 

 that help form the hip-joints. Then, too, the 

 mark of the inner, or short first, toe, is often 

 very evident, although it was a long time be- 

 fore the bones of this toe were actually found, 

 and many of the Dinosaurs now known to 

 have four toes were supposed to have but 

 three. 



It seems strange, and it is strange, that 

 while so many hundreds of tracks should have 

 been found in the limited area exposed to view, 

 so few bones have been found our knowledge 

 of the veritable animals that made the tracks 



* It is to be noted that a leaping kangaroo touches the 

 ground neither with his heel nor his tail, but that between 

 jumps he rests momentarily on his toes only ; hence impres- 

 sions made by any creature that jumped like a kangaroo would 

 be very short. 



