152 Field Columbian Museum — Geology, Vol. II. 



rudimentary, subtriangular in shape, with the obtusely pointed distal part 

 curved, altogether resembling an obtuse claw. The first toe has a single 

 phalange, which is long, cylindrical, gently curved, and obtusely pointed. 

 The second toe has two phalanges, the first of which is elongate and 

 grooved with a distal trochlear articulation. The second phalange 

 resembles the first of the first toe, but is shorter. The third toe has four 

 phalanges, the proximal one of which is like that of the second toe, but 

 is elongate; the second is broader than long; the third is like the first, but 

 is shorter; the fourth is a short, scarcely curved and obtusely pointed claw. 

 The fourth toe has five phalanges, of which the first, fourth, and fifth 

 resemble the first, third, and fourth of the third toe, the second and third 

 the second of the same toe. This toe is the longest. The fifth has no 

 phalanges. I may add that the foot from which these measurements were 

 taken was found together, with the bones in place or but little displaced, 

 and has been so mounted in the University of Kansas Museum. I have 

 repeatedly examined these bones, and am confident that the number of 

 phalanges are as I have given them ; that is, there is an absence of the 

 claws on the first and second toes. The measurements of this specimen 

 are as follows : 



mm. 



Femur, length 260 



Diameter of head 20 



Width of condyles - 30 



Tibia, length 362 



Metatarsals, length ^ -- 101, 105,95, 80, 25 



Phalange, first digit, length 41 



Phalanges, second digit, length 25, 31 



Phalanges, third digit, length 35, 4, 27, 12 



Phalanges, fourth digit, length 40, 3, 3, 26, 12 



Ossified tendons. Numerous thin, flat, striated bones are lying on 

 the matrix associated with the anterior extremity, which can only be 

 regarded as tendinous ossifications. One of these on- each side is lying 

 by the side or upon the pteroid bone, with its pointed extremity near 

 its proximal end. They measure one hundred to one hundred and twenty 

 millimeters in length, with a greatest breadth of twelve millimeters. Two 

 others are lying by the side of the proximal end of the right wing 

 metacarpal; they are somewhat shorter and have the flattened fimbri- 

 ated end distad. Another is lying by the side of the distal end of the 

 same bone. There is a shorter, more fan-shaped one by the right humerus, 

 and fragments of others are scattered about the arms. Altogether there 

 are seven of these of about one hundred millimeters in length. Their 

 texture is striate, as though composed of slender, ossified, tendinous fibers, 



