Natural Science, vol. v. 



[Plate IV. 



ArCH/EOPTERYX. 



From a photograph of the specimen now in the Berlin Museum, f natural size. 

 Reprinted from " Lectures on the Darwinian Theory," by A. Milnes Marshall, with 

 the kind permission of Dr. C. F. Marshall, at whose special request the figure is 

 printed in the reverse position to that in which it is usually presented. 



