238 AN ATTEMPT TO DESCRIBE THE ANIMALS THAT MADE 



from the second to the third, 0.6 i;ich ; from the third to the fourth, 

 0.5 inch. Angle between the axis of the foot and the line of di- 

 rection, 0= to 80°. Toes all turned outward; much spreading. Feet 

 turned outward. Distance of the heel from the line of direction, 

 to 1.1 inch. 



Fore feet. — Pentedactjlous. Divarication of the outermost of 

 the four front toes, 125° ; of the inner and second, 50° ; of the 

 second and third, 50° ; of the third and fourth, 25°. Length of 

 the inner toe, 0.25 inch ; of the second, 0.45 inch ; of the third, 

 0.4 inch; of the fourth, 0.3 inch; of the fifth, 0.1 inch; of the 

 foot, 0.6 inch. Foot digitigrade. More distant from the line of 

 direction in walking than the hind toe, but less divaricate. Track 

 from to half an inch in advance of the hind foot. Tracks of both 

 feet, of the natural size, and in normal position, shown on Plate 

 15, fig. 7. 



Locality. — Turner's Falls ; below the Falls, on the Gill side. 



Remarks. — The first specimen of this species, discovered by 

 Mr. Marsh and now in his cabinet, exhibits only the hind toes. 

 As soon as I saw it, I recognized it as nearly related to the Sauroi- 

 dichnites palmatus of my Massachusetts Report, and probably iden- 

 tical with it ; although I had then no certain evidence that any 

 of them were quadrupeds, as we had then on the specimen only 

 an alternation of the right and left hind foot, as shown on Plate 

 19, fig. 5, which is a copy of the slab above referred to in Mr. 

 Marsh's cabinet, reduced to one third of its natural size. ^Vhen, 

 however, I discovered the small tracks connected with the large ones 

 of Macropterna recta (S. palmatus), I hastened to Greenfield to re- 

 examine Mr. Marsh's specimen, in the hope of finding there also 

 the fore foot. To my surprise and gratification, I found that he 

 had obtained from a new locality, below Turner's Falls, most beau- 



