710 GEOLOGICAL SURVEY OF THE TERRITORIES, 
PLATE IX. 
Fic. 65.—Posterior view of pygostyle, adult Centrocercus. 
Fic. 66.—The same, left lateral view. 
Tic. 67.—Pelvic limb, anterior view, Centrocereus, taken from same bird as in Fig, 
57: EL, Epienemial epiphysis of the tibia; #', the confluent tarsal bones found at the 
distal extremity of the tibia at this age, tibiale (astralagus), and jibulare (os ealcis): 
Ei'', the centrale. 
Fic. 68.—Left tarso-metatarsus, inside view, adult 3, Centrocercus. 
Fig. 69.—Anterior view of right tibia and fibula, from the same skeleton as 68. 
Fic. 70.—Anterior view of right femur, same bird as shown in Figs. 68, 69. 
