192 AN ATTEMPT TO DESCRIBE THE ANIMALS THAT MADE 



inner toe, 4.2 inches; of the outer toe, 5.2 inches; of the hind toe, 

 3 inches. Length of the heel, 6 inches (?), Width of the heel, 

 3.5 inches; of the foot at the roots of the toes, 2.2 inches. Length 

 of the middle toe beyond the others, 4.3 inches. Distance between 

 the tips of the lateral toes, 7 inches; between the inner and middle 

 toes, 4.5 inches ; between the outer and middle toes, 6.5 inches ; 

 between the middle and hind toes, 11 inches. Track shown, of 

 the natural size, on Plate 7, fig. 5. 



Locality. — Montague City, a few rods east of the canal, on the 

 road to Boston. 



Remark. — This is a somewhat doubtful species. The single 

 specimen obtained I could not refer to any known species, and 

 therefore have dedicated it to Professor C B. Adams, of Amherst 

 College. The hind toe is not very distinct. The heel, or rather 

 the tarsal bone, seems to have sloped upwards at a small angle. 



Species 2. Ornithopus gallinaceus. (PI. VIII. Fig. 1.) 



Ornithoidichnites tetradactylus, Mass. Geol. Report, Plate 46, 

 fig. 42. 



Nos. 112-117, 172, 174, in Cabinet. 



Divarication of the lateral toes, 60^ to 80^ ; of the inner and 

 middle toes, 35° ; of the middle and outer toes, 45°; of the middle 

 and hind toes, 140°. Length of the middle toe, 2.75 inches ; of 

 the inner toe, 1.5 inch ; of the outer toe, 1.8 inch ; of the hind 

 toe, 1 .3 inch ; of the foot, exclusive of the hind toe, 2.5 to 3 inches ; 

 of the step, 7 inches ; of the middle toe beyond the others, 1.5 

 inch. Distance between the tips of the lateral toes, 2.37 inches ; 

 between the inner and middle toes, 1.9 inch ; between the outer 

 and middle toes, 1.8 inch; between the middle and hind toes, 

 4.2 inches. Foot plantigrade. Toes nearly straight. Track shown, 

 of the natural size, on Plate 8, fig. 1. 



