236 MEMOIRS OF THE CARNEGIE MUSEUM 
face of the bone, and furnishes muscular attachment for Mc.V, but does not articu- 
Fie. 30. Cuneiform (left side) of D. 
superbus. Nat. size. 1, dorso-ulnar 
view ; 2, dorsal view ; 3, inferior view ; 
4, superior view; 5, palmar view ; 6, 
palmo-radial view. 
Greatest antero-posterior diameter 
Greatest transverse diameter...... 
Greatest vertical diameter of dorsal face.. 
Pisiform. —In its general proportions the pisiform 
is quite robust; it is proportionally slightly heavier 
than in the tiger, but has a relatively shorter shaft. 
The articulations for the ulna and cuneiform are sub- 
equal in size and thus quite unlike the corresponding 
surfaces in Canis, in which the articulation for the 
cuneiform is much the larger of the two. As stated 
above the shaft is short and heavy and terminates in 
late with the latter as in the dogs. The facets for 
the ulna and pisiform on the proximal face are sub- 
equal in size and are separated by a prominent ridge, 
the former being more concave antero-posteriorly 
than the latter. In the dogs the facet for the ulna is 
different, being more sinuously curved, with an antero- 
posterior cavity on the ulnar angle and an antero- 
posterior convexity on the proximo-dorsal angle of 
the bone. The distal face is taken up by a large 
facet which is concave in all directions and articu- 
lates with the unciform. The bone as a whole is not 
unlike the cuneiform of the tiger. 
MEASUREMENTS OF CUNEIFORM. 
Fic. 31. Pisiform (left side) of 
D. superbus., Nat. size. 1, ulnar 
and superior views; 2, view of ar- 
an expanded and truncated free end with the ver- ticular facets of cuneiform and ulna ; 
tical diameter greater than the transverse. 
Greatest diameter. 
Antero-posterior diameter of articular facets. 
¢, u, cuneiform and ulna facets, re- 
spectively. 
MEASUREMENTS OF PISIFORM. 
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Vertical diameter at free end.... 
Trapeziwm.—The trapezium is of moderately large size. Its dorsal or dorso- 
radial face is considerably exposed (when viewed from in front), and its general out- 
lines are pentagonal, while on the palmar or postero-ulnar angle there is a heavy 
