CHAPTER XXII 



1868 



IN 1868 he published five scientific memoirs, amongst 

 them his classification of birds and "Bemarks upon 

 Archaeopteryx Lithographica " (Proc. Roy. Soc. xvi. 

 1868, pp. 243-248). This creature, a bird with 

 reptilian characters, was a suggestive object from 

 which to popularise some of the far-reaching results 

 of his many years' labour upon the morphology of 

 both birds and reptiles. Thus it led to a lecture at 

 the Royal Institution, on February 7, "On the 

 Animals which are most nearly intermediate between 

 Birds and Reptiles." 



Of this branch of work Sir M. Foster says (Obit. 

 Not. Proc. Roy. Soc. vol. lix.) : 



One great consequence of these researches was that 

 science was enriched by a clear demonstration of the many 

 and close affinities between reptiles and birds, so that the 

 two henceforward came to be known under the joint title 

 of Sauropsida, the amphibia being at the same time 

 distinctly more separated from the reptiles, and their 

 relations to fishes more clearly signified by the joint title 

 of Ichthyopsida. At the same time, proof was brought 



