Foot-pads of the I oung of the Green Woodpecker. 619 
XXXI.— On the Foot-pads of the Young of the Green Wood¬ 
pecker. By Charles Stonham, C.M.G., F.R.C.S. 
(Text-figure 11.) 
In The Ibis for 1890 (p. 411) there is a note, with two 
woodcuts, by Dr. Gunther, drawing attention to the tuber- 
culated thickening of the skin which covers the heel of the 
young Wryneck ( lynx torquilla) . Dr. Gunther points out 
that this modification must be regarded as an accessory 
means of locomotion. I have for some time endeavoured 
to obtain a young Woodpecker for purposes of comparison 
and have succeeded this year. 
a Text-fig. 11. 
The accompanying text - figure shews that in the 
Green Woodpecker ( Gecinus viridis ) there are heel-pads 
precisely like those described by Dr. Gunther in the Wryneck. 
I have not been able to obtain nestlings of either the Great 
or the Lesser Spotted Woodpecker, but it is practically 
certain that they also possess these pads when quite young *. 
The drawings, by Miss L. M. Medland, are of life-size. 
* [The same structure has been stated to exist also in a Barbet ( Cyanops 
asiatica ). See Pycraft, Bull. B. 0. C. viii. p. xl (1899 ).—Edd.] 
2 t 2 
