1870. ] DR. J. MURIE ON SAIGA TARTARICA. 473 
or superior limb of the os pubis is stouter than the posterior one. 
The symphysis, roughened and protuberant in front, is continued 
backwards, carinate ; the pubic arch is very deep, narrow, and A- 
shaped. Each obturator foramen is widely subcirenlar. The body 
of the ischium is thin, with a very sharp superior (or posterior) 
border, its spine forming a wide upward sweep in the bony curva- 
ture. The combined tuber ischii (¢. 7.) and ramus, flattish below and 
mesially ridged above, have a reverse plane from the body of the 
ischium; namely, they are horizontal and widely expanded in a tre- 
foil shape. The inner plate or ramus, the thinnest, joins the pubis ; 
the posterior tuberosity is thick and bulbous; and the third outer 
spur, which I designate the external tuberosity (e. sp.), has an inter- 
mediate thickness and breadth. An angle of 75° approximately gives 
the separate plane between the iliac and the ischio-symphysial axes. 
From within outwards the neck of the femur is very broad, but 
exceedingly short, it and the head being antero-posteriorly flattened. 
The articular surtace of the latter, consequently, is of a transversely 
oval shape, depressed, and almost at right angles to the axis of the 
shaft: a roughening indicates the round ligament. The intertro- 
chanteric fossa burrows deeply at the root of the great trochanter, 
and from that inwards is more open. The great trochanter is large, 
and posteriorly rises ¢ of an inch higher than the head; its gluteal 
surface has a long subquadrate outline. Relatively, the trochanter 
minor is small, and, as in other Ruminants, a third trochanter is 
wanting. The shaft has a slight forward axial bend; and a long but 
feebly developed linea aspera descends its whole length on the pos- 
tero-outer side. ‘The condyles are large and subequal in size; the 
intercondyloid space narrow and shallow. 
With reference to the patella, it is short, stout, and of a nearly 
equal-sided triangular figure. Its articular surface is but slightly 
convex. In the fresh condition of the parts the eminence of the 
outer border is heightened by a wall of cartilage: the prominent 
ridge thus produced overlaps and grasps the anterior articular rim 
of the internal condyle, allowing of an upward and downward gli- 
ding movement, and preventing luxation from side to side. 
The articular crown of the tibia is heart-shaped, but with a deep 
incision for the tibialis-anticus tendon on its outer border towards 
the front. This causes the outer, fibular moiety or condyle, which 
superiorly is the more convex of the two, to be shorter than the 
inner one; whilst it is also the broader, and has a posterior deep- 
based margin. The tubercles for the crucial ligaments are well deve- 
loped. The anterior tuberosity is large, though laterally compressed, 
sharp-edged ; and, from being three-sided and of considerable mag- 
nitude above, the shaft narrows and is roundish in its lower two- 
thirds. The muscular grooves are well marked. 
Nothing can exceed the compact interlocking, yet easy, gingly- 
moid movement devised between the distal articulation of the tibia 
and caleaneum, all chance of lateral dislocation being prevented by 
the strong internal malleolar plate and the guard of the external 
side, which is the inferior fibular segment presently to be spoken of. 
