346 MR. A. H. GARROD ON THE DEEP [Apr. 20, 
gonatous 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 pecu- 
liar till they have descended two thirds down the tarso-metatarse. 
About opposite the middle of that bone the flexor 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 digitorum 
does not split up, but runs to one digit only, namely the third toe, 
Pig. 7. Fig. 8. 
Crotophaga sulcirostris. Megalema asiatica. 
which is the outer of the two that are directed forward. It is 
covered superficially by the flexor perforans digitorum, just as that 
latter muscle is splitting up to be distributed to the hallux as 
well as to digits 2 and 4. In these birds we have, therefore, the 
flexor longus hallucis arising from the lower surface of the femur 
only, running through the ankle at the outer side of the other 
deep tendon, and sending a vinculum downwards—all of which are 
