Manchester Memoirs, Vol. Ixvi. (1922), No. 2 



The reader will find in Galton's book descriptions of manv 

 number-forms. To them may be added the following account 

 of a form which, while it illustrates many usual characteristics, 

 is of interest in that in certain other important respects it 

 cannot be called typical. It is that of Professor W. M. 

 Tattersall, of Cardiff, to whom, as well as to other friends 

 mentioned below, I express my thanks for their kindness in 

 readily supplying me with these details. 



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