[MATTHEW] NEW GENUS OF BATRACHIAN FOOTPRINTS 99 



the three toes. Sole 6 mm. long, 6 mm. wide, subquadrate; there is 

 an impressed lobe at the inner angle and a very faint lobe at the 

 outer corner. Angle of digits, II.-IV.=65° ; II.-III.=20° ; III.- 

 IV.=45°. 



This species is remarkable for the heavy square sole to the hind 

 foot, and the fore foot has a sole similar in form though the outer 

 triangular half is only lightly impressed, and often is not seen. The 

 quadrate sole and conspicuous claws are not usual characters in Nanopus. 



Baeopezia.i 



Sauropus [Lea?], as defined by Sir William Dawson, consisted 

 of " large plantigrade animals, probahly Labyrinthodonts, or allied. ' 

 Hind foot usually larger, five toes." 



The track described by Dr. Lea under this name was not very 

 different from that which Dr. King had previously described inad- 

 vertently under the name of Sphipropezium (changed by him in the 

 same year to Thenaropus), either in size or in general appearance. There 

 were, however, some important differences. Sauropus was represented 

 as having a median " tail mark " or groove, and, so far as the figure 

 shows, the fore foot left three toe prints in place of four as in Then- 

 aropus. 



Unless, therefore, Sauropus is made very broad in its scope, it will 

 not include 8. Sydnensis, in which the formula of the toes is 4 — 3; 

 that is four on the hind and three on the fore. Also the form of the 

 sole and toe prints is in many respects quite different from Lea's Sauro- 

 pus, and more like King's Sphseropezium. There is also in S. Syd- 

 nensis, Dawson, no median furrow between the footprints; in this it 

 differs from Lea's species. It would seem necessary, therefore, to 

 separate Dawson's species from Sauropus. 



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. 



Palaeosauropus 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 Baro- 

 pezia for this type. 



Baropezia had the print of four toes on the hind foot and 4;hree 

 on the fore ; these toe prints were round, several were detached from the 



^Can. Rec.^ci., Vol. iX., No. 2, p. l05. MontreaJ, 1903. 



