656 } S. W.. WILLISTON 
expanded. Its first phalanx is short and expanded, much shorter 
and smaller than the corresponding phalanx of the third finger. At 
its distal extremity is preserved the proximal extremity of a very 
small second phalanx; and there was probably no more present in the 
living animal. ‘The third metatarsal is much longer than the second, 
with its proximal extremity more oblique to its long axis. Its distal 
extremity is quite on a line with the distal extremity of the second 
metatarsal. The first phalanx is stouter and longer than the first 
phalanx of the second digit, and a trifle smaller than that of the fourth, 
its greatest width about equal to two-thirds its.length. The second 
phalanx, preserved entire, is much smaller than the first, and is very 
short and broad, its width equal to its length; it is but little constricted 
at its middle. A proximal half or end of a minute third phalanx is 
also present. It was somewhat pointed in shape, but by no means a 
claw. The fourth metatarsal is much like the third and of about the 
same length, its proximal extremity yet more oblique. Its proximal 
phalanx is a little longer than the first of the third digit, its distal 
extremity surpassing a little the distal extremity of the third metatarsal. 
The second phalanx is a little longer but no broader than the second 
of the third toe. Its third phalanx is about two-thirds the length of 
the second, but is much narrower distally. The basal of part of the 
fourth phalanx, a very small bone, is articulated with the third and it 
is very evident that it was the terminal one, and was very small and 
in no sense aclaw. The fifth toe is slender, and was divaricated in 
life. In the specimen, while still retaining its articulation with the 
tarsus, it is turned across the fourth and third metatarsals. Its 
metatarsal is much narrower, and not more than three-fourths the 
length of the fourth. Its first phalanx, likewise slender, is about the 
length of the first phalanx of the second toe, but is much narrower. 
The second phalanx, much shorter, is narrowed distally, but with a 
minute terminal knob or expansion. Possibly an ossicle not larger 
than a pin-head may have articulated here, but probably not. 
The actual phalangeal formula of the foot as preserved is, it is seen, 
I, 2, 3, 4, 2. It is possible, though not very probable, that the first, 
second, and fifth digits may have had a minute ossicle at the extremity 
of each, making the formula, 2, 3, 3, 4,3. The feet were clawless, the 
toes ending rather bluntly. The foot as a whole, it is seen, is remark- 
