On the Foot of the Young of lynx torquilla. 411 



to urge them forward. It is worth remembering that in 

 these habits the Divers resemble the Cormorants and the 

 Aleidse, whilst the Grebes seem to have had diving lessons 

 from the Ducks. 



There can be no doubt that the Puffin, and probably its 

 nearest allies, feed their young in the nest until they are able 

 to fly, exactly as the Petrels do, and consequently that my 

 diagnoses of the Ciconiiformes and Galliformes (Seebohm, 

 Classification of Birds, p. ix) are not absolutely diagnostic. 

 The diagnosis of the Order Gallo-Grallse on page 36 is easily 

 altered to exclude the Tubinares and Impennes, but the 

 Alternative Scheme, in the Appendix to the Introduction, 

 must, I thiuk, be given up. 



XL. — On the Foot of the Young of lynx torquilla. 

 By Dr. A. Gunther. 



In very young Wrynecks {lynx torquilla), about two days 

 old, in which the yolk has not yet been completely absorbed, 

 I have found a very peculiar modification of the skin covering 

 the heel. The skin of this part is greatly thickened, forming 



a. Young- Wryneck, about two days old; nat. size. 



b. Foot with heel-pad ; X 2 nat. size. 



a prominent pad, 5 millim. long and half as broad, the surface 

 of which is studded with obtusely conical tubercles, as shown 

 in the accompanying woodcut. These tubercles are the 



