A BIRD’S LEG 193

being the ‘forehead ;’ 3 shows the ‘ear-coverts,’ or
‘auriculars,’ and 4 is the back; 5 is the ‘alula’ or
bastard wing on the rudimentary thumb, and 6 shows
the ‘ wing-coverts ;’ 7 shows the greater wing-coverts
_and 8 the ‘tertiaries,’ 9 the ‘ primaries’ on the fingers
and wrist bones, and 10 the ‘secondaries,’ on the
ulna; 11 is the tail, 12 shows the upper tail coverts
and 13 the under tail coverts ; 14 is the so-called
tarsus, which is really the tatso-metatarsus.

 

A BIRD’S LEG

Just one more diagram, that of a bird’s leg. Here -
the femur is shown at A ; the tibia is shown at B j all
that remains of the other shank bone, the fibula, is
shown at C just under the knee, which you can recog-
nise, as you can recognise the horse’s true knee, by
the way it bends outwards; but the fibula, though
always imperfect, is not always as short as this, and

N