82 

E.N. ARNOLD 
Fig. 12 Movements of hind leg of ground dwelling lacertid when running (left — lateral views, right — dorsal views). a. Beginning of power stroke: limb 
extended anterolaterally with toes 1-4 directed forwards and spread with claws inserted in substratum. b. Crus flexes on femur. c. Femur begins to retract, 
crus becomes more horizontal as femur rotates forwards and the metatarsal segment rises and is turned laterally bending the toes. d. Femur continues to 
retract, crus and metatarsal segment extends backwards and lizard rises on tips of toes 2-4. 
