in the Classification of Birds. 23 
The strength and size of the vinculum is different in 
nearly every group of birds where it is present. In figure 10 
at a, I have shown the position and size of this vinculum 
as I found it to be present in the Ground Cuckoo. 
Fig 12, 
4A%g ‘ ie, 
Fig,11. Right foot of Megalema asiatica, showing an arrangement of the 
plantar tendons. 
Fig.12, Left foot of Gallus bankiva. V. vinculum running downwards 
from the outer hallucial tendon to the inner digital common tendon. 
Fig. 13. Right foot of Apteryx mantclli. (All three figures copied by the 
author from Garrod.) 
In order to show how different this disposition of these 
plantar tendons may be, I quote Garrod’s description of 
his dissection of the foot ‘of a specimen of Megalema asi- 
atica (fig. 11). He says, in this bird ‘‘the two tendons 
descend behind the ankle as usual, having their origins 
typical. There is nothing peculiar till they have descended 
