226 AN ATTEMPT TO DESCRIBE THE ANIMALS THAT MADE 



0.15 inch. Length of the step, 11 to 14 inches. Leg above the 

 tarsal joint often making an impression in walking, several inches 

 in length, which forms an angle with that of the long tarsus, of 

 about 35°, indicating a sprawling mode of progression, as is shown 

 on Plate 14, fig. 1. 



Fore feet. — Very similar to those of the first species ; but my 

 specimens of these are too imperfect for description. 



Localities. — Plate 20, fig. 6, was taken from a specimen pre- 

 sented me by Dr. Barratt, of Middletown, to whom the species is 

 dedicated, because discovered by him. (See Mass. Geol. Re- 

 port, Vol. II. p. 477.) The specimen from which the sketch, 

 Plate 14, fig. 1, is taken, was found at Marsh's Quarry, in Mon- 

 tague, but was much injured before I found it. I feel confident, 

 however, that the dotted lines represent it as it was originally, 

 although that part of the specimen is wanting. The five toes on 

 the hind foot of this species clearly distinguish it from the Anoma- 

 pus scambiis. When I described the tracks of this species in the 

 Massachusetts Geological Report, I had no certain evidence of its 

 quadrupedal character, though strongly suspecting it to have been 

 made by a quadruped. 



Genus XVI. ANISOPUS. 



Quadrupedal ; hind feet nearly twice as long as the fore ones, 

 and considerably wider. Both hind and fore feet four-toed. In 

 walking, the hind foot was brought up nearly into the place of the 

 fore one. Tracks but a little to the right and left of the line of 

 direction. Foot pachydactylous. 



Species 1. Anisopus Deweyanus. (PI. XVI. Figs. 5, 6.) 



Sauroidichnites Deweyi, Trans. Assoc. Amer. Geologists, Plate 

 11, fig. 9. 



