172 
ANATOMY OF THE RABBIT. 
The fibular portion presents a transverse groove for the convex 
articular surface of the calcaneus. 
Immediately above it, on the 
lateral side of the bone, is a prominent projection, the lateral 
malleolus (malleolus lateralis). 

The bones of the left 
FIG. 72. 
foot, viewed from the dorsal sur- 
face: T, tarsus; M, metatarsus; P, 
phalanges. II-V, the four meta- 
tarsal bones: cb., cuboid; cl., 
calcaneus; c.s., second cuneiform; 
c.t., third cuneiform: f.a., articular 
surface for fibular side of the tibo- 
fibula; on, navicular; t, talus; 
t.c., tuber calcanei; t.t., trochlea 
tali. 
It forms the anterior boundary 
of a groove which in the natural con- 
dition lodges the insertion tendons of 
the peroneal muscles. 
THE TARSUS. 
The tarsus (Fig. 72) comprises six 
elements, the tarsal, or ankle-bones 
(ossa tarsi), which, like the correspond- 
ing bones of the carpus, are arranged in 
proximal and distal rows. An exception 
is to be made, however, for one element, 
the navicular, which occupies an inter- 
mediate position. The proximal row 
contains two elements, the talus and 
calcaneus. The talus is medial and 
also slightly dorsal in position. Its 
proximal end, described as the body 
(corpus tali), bears an extensive pulley- 
like surface, the trochlea tali, for 
articulation with the tibia, these two 
surfaces together forming the chief 
portion of the ankle-joint. Its distal 
end, termed the head of the talus (caput 
tali), provides a convex articular surface 
for the navicular bone, and is separated 
from the larger trochlear portion by a 
slightly constricted intermediate portion 
or neck (collum tali). Its ventro- 
lateral border is extensively articulated 
with the calcaneus. The latter is a 
cylindrical element, fully twice as long 
as the talus, since it is extended backward behind the ankle-joint, 
as the tuber calcanei, or bone of the heel. 
Its dorsal surface 
