242 AN ATTEMPT TO DESCRIBE THE ANIMALS THAT MADE 



Batrachia would walk so nearly in a right line ? Yet the tracks of 

 Xiphopeza and the Macropterna divaricans show sprawling legs, 

 like existing lizards. Most of the fossil animals, also, brought up 

 the hind foot in walking more nearly into the place vacated by the 

 fore foot than existing lizards or batrachians do. It would seem 

 as if these animals must have had longer and more upright legs 

 than any of these tribes now alive. This is, however, less the 

 case in the present group than in some of Group VI. I ought 

 to add, that there is one living species of salamander, and per- 

 haps more, with feet exceedingly like those of the Macropterna 

 rhijnchosauroidea ; namely, with four toes on the hind feet, and 

 three on the fore feet. This is the Salamandre de Trois Doigts 

 of Sonnini and Latreille, from whose work on reptiles the outline 

 of this animal, given on Plate 20, fig. 8, was copied. Yet how 

 much more sprawling and divaricate must be the tracks of this an- 

 imal than those of the Macropterna ! 



Group VIII. CHELONIANS. 



Quadrupedal ; fore feet less than the hind ones. Animal with 

 sprawling or trailing legs. 



Genus XX. ANCYROPUS. 



Hind feet the larger ; three leptodactylous toes in front, and 

 one proceeding from the posterior part of the heel. Toes on the 

 fore foot, three in front; perhaps one behind. Heels before and 

 behind, long and crooked. Toes of both feet much curved out- 

 ward. Tracks in two parallel rows. Feet slightly resembling an 

 anchor, and hence the name. 



