106 Canadian Record of Science. 



But there is a cogent reason why Sauropus should be 

 used neither for Lea's nor Dawson's species. The name 

 was preoccupied, according to 0. P. Hay, by E. Hitchcock 

 for a genus of Triassic footprints of a different type. 



Palseosauropus has lately been offered by Dr. 0. P. Hay 

 as a generic name for Dawson's species, above discussed, 

 but as Dr. Hay refers to Lea's Sauropus as the type of his 

 genus (being the first described) it obviously will not 

 apply to Dawson's species, which is of quite a different 

 type, as above shown. We therefore, propose the name 

 Baropezia for this type. 



Baropezia had the print of four toes on the hind foot 

 and three on the fore; these toe prints were round, several 

 were detached from the print of the sole, and all were 

 without the trace of a nail. The impression of the sole 

 was heavy, with usually apophyses or swellings on some 

 part of the sole. The impression of the fore foot is 

 smaller than that of the hind, and usually placed be- 

 hind it. 



Judging by the length of stride, these animals, notwith- 

 standing their weight, were of active habit, and travelled 

 rapidly over the sand. 



Sauropus Sydnensis, Dawson (PL, Pigs, la and lb) is 

 the type of Baropezia, and there is one other species. 



The generic name is in allusion to the heavy impression 

 made by the sole of the foot. 



In the type species of this genus the two footmarks are 

 much alike ; there is not a long heel on either foot to dis- 

 tinguish them ; the number of toes, however, is distinc- 

 tive. In both feet the normal number of digits is reduced, 

 and the one with three toes may be seen to be smaller 

 than the other. 



It may also be mentioned (though not much weight can 

 be laid upon this argument) that in the series of foot- 

 prints which indicates this species, one of the three-toed 

 footprints fails to appear ; the series of footmarks runs 

 across a strongly wave-marked slab, and this footmark -has 



