A. Middle phalanx
B. Dist. phalanx
C. Coffin joint
D. Navicular

a. Angle of sole
b. Collateral sulcus
c. Water line
d. Periople (B)
e. Bulb of heel (A)
f. Sulcus of frog
g. Apex of frog
h. Wall
i. Laminar surface of wall (C)
j. Coronary groove
k. Spine of frog
l. Solar foramen
m. Digital cushion (D)