296 ON THE DEEP PLANTAR TENDONS IN BIRDS. 
Besides the three last peculiar arrangements of the tendons, which 
T have not found elsewhere described, there is another still more pecu- 
liar and unexpected. I have observed it in all the Anomalogonatous 
Page 346. birds with scansorial feet which I have examined, and in them only, it 
being present in 
Ramphastos ariel, Tiga javanensis, 
Megalema asiatica, Galbula albirostris, 
Gecinus viridis, Urogalba paradisea. 
It is represented in fig. 8. The two tendons descend behind the 
ankle as usual, having their origins typical. There is nothing peculiar 
till they have descended two-thirds down the tarso-metatarse. About 
opposite the middle of that bone the flewor longus hallucis sends a 
vinculum downwards as in the Fowl, to join the tendon of the flexor 
perforans digitorum. Just above the metatarso-phalangeal articulation 
the tendons become arranged for distribution in a most uncommon 
manner., The tendon of the flexor perforans digitorwm does not split 
up, but runs to one digit only, namely the third toe, which is the 
Fig. 7. Fig. 8. 
Til 
Crotophaga sulcirostris. Megalema asiatica. 
outer of the two that are directed forward. It is covered superficially 
by the flecor perforans digitorum, just as that latter muscle is splitting 
up to be distributed to the hallux as well as to digits 2 and4, In these 
