PICABI^ 



flexor perforans digitorum which supplies the third toe ; so that 

 while the fourth and second toes are supplied by the flexor perforans 

 digitorum, and the first by the flexor long us hallucis, the third is 

 supplied by a twig from both tendons (fig. 2/). 



s*> 



FIG. 4. Base of the skull of Grus pavonia, showing the schizognathous 

 arrangement of palate-bones : vo, vomer : mxp, maxillo-palatines ; pa, pala- 

 tine ; sph.r, sphenoidal rostrum ; ptg, pterygoid ; b.spli, basi-sphenoid. 



III. The oil gland is situated on the dorsal side of the tail of 

 the bird just at the root of the tail feathers ; it may be present or 

 absent, and if present it may be surrounded by a tuft of feathers or 

 nude. 



