PIOABI^ 



(d) Picine, in which the flexor perforans digitorum leads to the 

 third digit only, and the flexor longus hallucis supplies the first, 

 second and fourth digits, and is also connected with the flexor 

 perforans digitorum (fig. 2d). 



Pig. 3. — Base of the skull of CorvuUuralbicolUs showing the aegithognathous 

 arrangement of the palate-bones : vo, vomer ; mxp, maxiUo-palatines ; lac, lacry- 

 mal ; pa, palatine; sph.r, sphenoidal rostrum; b.sph, basi-sphenoid ; pig, 

 pterygoid ; g, quadrate. 



(e) Coraciine, in which the two tendons are coalesced ; the 

 flexor perforans digitorum supplies either the first, second and 

 third, or all four digits ; the flexor longus hallucis supplies either 

 the third and fourth, or second, third and fourth digits (fig. 2e). 



(/) Upupine. — The flexor longus hallucis joins the head of the 



