234 MEMOIRS OF THE CARNEGIE MUSEUM 
The olecranon process of the ulna is very short, truncated, and more inwardly 
produced than in the Oligocene genus. The tendinal sulcus, though well defined 
and wide, is not so deep as in Canis lupus, and consequently much less developed 
than in the cats. The principal feature of the greater sigmoid notch is its heavy 
coronoid process, which character is feline rather than canine. The shaft is very 
heavy and not much curved. The tuberosity for the flexor profundus digitorum 
muscle on the external border of the shaft is very heavy, as is well shown in Figs. 5 
and 6, Pl. LXXIX. Distally the shaft is more trihedral in cross-section due to the 
sharp ridge which separates the internal and posterior surfaces as in the tiger. 
The articulation for the radius on the distal end is a heavy rounded knob much 
as in the large cats and entirely unlike that in the dogs. The styloid process ex- 
tends well down and has a decided constriction above the articulation for the 
cuneiform. 
In Cynodesmus brachypus both ulnee are represented. The olecranon process is 
short and truncated, the tendinal groove is deep as in Canis, but the coronoid 
process is larger in proportion than in the recent dogs, as is also the shaft. The 
distal end, however, lacks the heavy and broad development of the rounded tubercle 
which articulates with the radius and is so conspicuous in the genus under descrip- 
tion. The feature of this reduction of the ulna in C. brachypus is apparently a 
decided step towards conditions found in Camis. 
MEASUREMENTs OF RADIUS AND ULNA. 
Radius, greatest length .. 
Radius, antero-posterior diameter of proximal end. 16 
BONUS) ABBY CLEe Cini Cher OL PIORMMAl CNC iivssiss iosrss8¢ssarsesavs steve vdlovestabds vabevidtscer osdeogtensvenes 23 
Radius, transverse diameter of shaft medially 15 
Radius, antero-posterior diameter of shaft medially . 12 
Radius, greatest antero-posterior diameter of distal end.............ccssssecccssesccsssccesscssenneeseeerecess 23 
Radius, greatest transverse diameter of distal end. 34 
Ulna, greatest length ......... 223 
Ulna, antero-posterior diameter at coronoid process.. 32 
Ulna, transverse diametenat COLOnOld PLOCERE. ci sacri ssscccd.odouseptscuesctdsdedssssdssurdenasesnoven¥dodeoore 25 
Ulna, transverse diameter of distal end at tubercle. 20 
Ulna, antero-posterior diameter of distal end at tubercle. ANE 
The Manus (Pl. LX XX).—With the exception of the trapezoid the manus of 
the type specimen is quite completely represented. As the forefoot was found 
more or less disarticulated the respective positions of the phalanges as determined 
by the writer may be somewhat conjectural; their positions are, however, suffi- 
ciently correct for a general description. 
In comparing the scapho-lunar bone with that of Daphenus felinus it is found 
