SMELET ON 863 
variable in extent, being comparatively largest in the Gallinw and 
some of the Cuculi and Musophagidx, while it is hardly indicated in 
many Grues, Ciconix, Phenicopterus, Columbxe, Lari, Psittaci, Bucerotidx: 
and Passeres. It may grow wholly from the pubis, or from that 
and the ilium, or in extreme cases from the last only. 
THE Posterior Limes or Legs, like the anterior, are composed 
of three principal portions (1) the Femur, which has been 
already mentioned (pages 248, 249), and the figures here intro- 
duced will shew some of its more important features ; (2) next the 
Trpra and FIpuLA; and lastly (3) the bones of the Feet. The 
proximal end of the Tibia has two facets, of which the inner is 
concave and articulates with the inner condyle of the Femur, 
while the outer is convex, and partly fits into the intercondylar 
suleus and partly articulates with the inside of the outer femoral 
condyle. It also supports the Fibula. From the anterior surface 
of its upper end arises a crest formed by two ridges, of which the 
inner is generally the more prominent. They serve for the origin 
of part of most of the extensor muscles of the leg, the tendon of 
the chief of which, musc. femori-tibialis, is inserted on the upper 
part of the crest, and within this tendon is intercalated the PATELLA 
(page 698). In Colymbus 
and Podicipes is developed 
a long triangular process 
which stands high above 
the head of the tibia, and 
in the latter the almost 
equally -high triangular 
patella rests with its base 
on the intercondylar 
femoral sulcus, and_ its 
whole side against the 
outer surface of the crest. 
On the outer side of the 
tibia is the peroneal ridge 
serving for a lateral attach- f i iis ae 
ment to the Fibula, the yA os CRIS Toes ree Secbwias Seni Sud 
fusion of which with the 
T.m. 
ISVs ae eh 
Bi. Loop for Biceps cruris ; C.e. C.i. exterior and interior 
Tibia is generallyindicated Condyles ; F.p. Fossa poplitea; Fib. Fibular facet; f-t. 
1m] } } : 'o-tibi : 24 tic foramina ; 
as ar ce situs d Femoro-tibial attachment ; Fo, Pheuma : 
by a simil 4 ridge : ee Ga. Gastrocnemial tendons; H. head of Femur; 
further down. The distal Il. fm. ilio-femoral ; Is. fm. ischio-femoral ; NV. Neck ; 
end of the Tibia is com- p.i.f. Pubischio-femoral muscle; ob. Obturator 
muscle insertion. 
pletely fused with several 
of the proximal tarsal bones, which form an inner and an outer 
condyle, separated by a sulcus, and articulate with the “ tarso- 
metatarsus.” On the anterior surface a little above the sulcus just 
