115. =Heel pad= (_Pterna_; _Tuber_). The posterior portion of the
_pelma_, immediately under the joint of the foot, and frequently
prominent.
116. =Toes= (_Digiti_). The, usually four, sometimes three, very
rarely two, articulated portions of the leg hinged on the lower
extremity of the tarsus. When all four are present, one is usually
behind, sometimes two before, and two behind.
117. =Top of toes= (_Acrodactylum_). The upper surface of the toes
individually.
118. =Soles of toes= (_Hypodactylum_). The lower or plantar
surface of the toes individually.
119. =Side of toes= (_Paradactylum_). The sides, in any way
distinguished from the soles.