176 AN ATTEMPT TO DESCRIBE THE ANIMALS THAT MADE 



Length of the middle toe, 2 to 3 inches; of the inner toe, 1.5 

 to 2 inches; of the outer toe, 1.8 to 2.3 inches; of the claw, 

 0.4 inch ; of the foot, 3 to 3.5 inches ; of the step, 13 to 24 inch- 

 es. Distance between the tips of the lateral toes, 1.5 to 1.6 inch ; 

 between the inner and middle toes, 1.7 inch ; between the outer 

 and middle toes, 1.6 inch. Projection of the middle toe beyond the 

 lateral ones, 1,4 inch. Width of the toes, 0.4 to 0.6 inch. Length 

 of the proximal phalanx of the inner toe, 0.8 inch ; of the last 

 two, 0.9 inch ; of the first on the middle toe, 0.8 inch ; of the sec- 

 ond, 0.8 inch ; of the last two, 0.8 inch ; of the first on the outer 

 toe, 0.55 inch ; of the second, 0.4 inch ; of the third, 0.4 inch ; of 

 the last two, 0.55 inch. Toes straight ; claws somewhat abnormal. 

 Axis of the foot and line of direction entirely coincident. Track 

 shown, of the natural size, on Plate 3, figs. 3 and 4. Fig. 4 was 

 copied from a specimen from South Hadley, and shows the impres- 

 sion of the double-headed extremity of the tarso-raetatarsal bone, 

 behind the phalangeal impressions. 

 Localities. — Turner's Falls, South Hadley. 

 Remarks. — Distinguished from all other species by the less di- 

 varication of the outer toes, and the great length of the step. I 

 have reason to suppose that its most usual step was almost two 

 feet. This would make its leg nearly four feet long ; which is 

 greater than that of the red flamingo. 



Affinities of the Group. — The alternation of right and left feet 

 proves the animals to have been bipeds. The number and position 

 of the toes, but more eminently the number of phalanges in the 

 several toes, ally the animals strongly to birds. The want of a 

 hind toe, and the great length of most of the steps, ally them to 

 Grallae. The great thickness of the toes, and the great size of 

 the feet, in some instances, taken in connection with the fact, that 



