460 Reptilian Epiphyses 
of calcified cartilage on the external condyle and one on the internal con- 
dyle. The upper and lower ends of the radius and ulna have epiphyses. 
The upper end of the ulna has also an olecranal ossification which, in an 
older specimen, has become united with the epiphysis. There are no 
epiphyses on the carpals. On the metacarpals, however, they are found 
at each end. At the base of the proximal phalanges they are prominent 
structures, but are not distinguishable at the base of the distal phalanges. 
The head of the femur has an epiphysis and there is one on the trochanter 
Fie. 23. Femur, tibia and fibula of Amblyrhynchus. 11 natural size. 
(Fig. 23). On the lower end of the femur there are three epiphyses, none 
of which appear to be ossified. Each end of the tibia and fibula is pro- 
vided with a bony epiphysis. There is a small one on the tibiale, two 
small ones on the fibulare. The condition in the foot is the same as in the 
hand. There are distinct, bony epiphysial structures on the spines of the 
posterior cervical and anterior dorsal vertebre of this form. No epiphyses 
have been found on the centra of any reptile so far as I am aware. It is 
of interest to note in this connection that Beddard quotes Parker as an 
authority for the statement that there are epiphyses on the centra of some 
of the parrots. 
