198 ELEMENTS OF OENITHOLOGY. 



dyles, side by side. On the outer side of the outer condyle 

 is a depression into which fits the upper end of the "fibula." 



The tiUa ani Jibula are two elongated bones extending down- 

 wards side by side, but of rery unequal size. 



The fibula is a quite delicate needle-like bone which below is 

 imperfect, pointed, and often anchylosed with the tibia, but 



Pig. 159. 



Eight Foot or Emeu. 



The proximal tarsal element, which is supposed to answer to that tarsal, 

 or ankle, bone which is called " Astragalus " in man and beasts ; d^-d^, 

 second, third, and fourth digits ; m, metatarsals anchylosed together 

 into a tarso-metatarsal bone, except at their distal ends ; t, tibia ; t^, 

 the distal tarsal element exceptionally distinct in this bird. 



which somewhat expands and ends freely above, where it fits 

 into the notch just mentioned as being situated on the outer side 

 of the outer condyle of the femur. In some Penguins, however, 

 and sometimes at least in Pandion, the fibula is as long as the 

 tibia. 



