274 
The American Geologist. 
May, 1896 
curve forward to so great an extent, nor are they so pointed; 
the longitudinal diameter is considerably greater than in C. 
familiar is of equal size; the spinous process is weakly de¬ 
veloped and the diameter across the posterior zygapophyses is 
greater than across the anterior. The antero-posterior dia¬ 
meter of the sacrum is less than the transverse and the anterior 
portion considerably more transversely extended than the 
posterior; the anterior processes are rather narrow and elon¬ 
gate, not so robust as in the living species. The diameter is 
63 mm. ; the spinous process is undeveloped and the zygapo¬ 
physes very poorly so; there is on the whole very little vari¬ 
ation in transverse diameter throughout the bone. Compared 
with the development of the other vertebrae, the caudals are 
more robust and of greater relative length; the transverse 
diameter of the first caudal is greater than that of the sacrum ; 
its length is 70 mm. 
In T.ferox , the scapula differs somewhat from the usual 
shape in most Canidas . The greatest vertical length is from 
the coracoid to the posterior upper edge and not along the 
spine, as in C. familiaris : the spine, which measures 170 mm., 
is not so well developed, falling short of the supra-scapular 
border by quite 20 mm; on the lower end it is nearest the 
posterior border and not just above the glenoid. This cavity 
is rather shallow'. The glenoid and the coracoid borders, just 
above the distal, curve inward toward the spine and measure 
from edge to edge, at this point, only 35 mm., w T hereas in the 
living species of the same size this diameter is 45 mm. The 
prescapular fossa curves backward and inwrnrd and measures 
at its greatest diameter 38 mm ; the postscapular curves inward 
and has a diameter of 48 mm. 
The Tore Limb .—The limb bones of T. altigenis are not pre¬ 
served. The shaft of the humerus (fig. 6) is rather slender, 
with the anterior and posterior faces quite erect, not with the 
usual curvature; on account of this erect position of the 
shaft, the proximal end is curved backward rather more 
sharply than in the living species, in w^hich the entire shaft 
show's an easy backward curve; the anconeal fossa is 
not sufficiently deep to form a vacuity in the bone: 
the epicondylar foramen is present and fairly well de¬ 
veloped. The shaft above the trochlea is very fiat, the 
