I04 DICTION AR V OF BIRDS 





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Horizontal Projection^ of the Genealogical Tree of the Subclass 

 Aves Ornithurm. After Fiirbringer (op. cit. j). 1568.) 



^ Sir William Flower [Proc. Zool. Soc. 1869, p. 37) seems to have been the first 

 Zoologist to Tise this convenieut way of expressing relationships by thus representing 

 a transverse section of the diverging genetic lines or branches of a genealogical tree. 

 In practice, however, it comes to much the same thing as the Maps of Classification, 

 described by Strickland to the British Association in 1810 [Ann. Nat. Hist. vi. pp< 

 190, 191, pi. viii. ), of which a large one designed by him is now in the Cambridge 

 Museum ; but his trees were of course only metaphorically genealogical, and so 

 differed in principle. 



