J. S. Manson 63 



family would iM-csriit a more imiform character than they ilo later when 

 devek)pineiit and ditteruntiatioii have progressed, and it is this fturly 

 uniform character affecting the 4th digit of both hands and feet which 

 has been transmitted in the manner shown in the pedigree. 



The whole series of photographs and skiagraphs have been deposited 

 by the kind permission of Professor Arthur Robinson at the Anatomical 

 Museum of the University of Edinburgh, where they may be seen by 

 anyone interested. 



I am greatly indebted to L)r Fox of Warringtctn for the skiagraphs 

 of the Warrington family and to Dr Barclay of Manchester for the 

 skiagraphs of the Salford family. 



EXPLANATION OF PLATES XIV XIX. 



(The numbers refer to tlie pedigree ou p. 5'2). 



PLATE. XIV. 

 Photographs of III. 2, IV. 8 (on block B), IV. 14, and IV. 10 (on block D). 



PLATE XV. 

 Skiagraphs (B) of hands of III. 2. 



PLATE XVI. 

 Skiagraphs (Bi) of feet of III. 2. 



PLATE XVII. 

 Skiagraphs (F) of hands of IV. 14. 



PLATE XVIII. 



Skiagraphs (F,) of feet of IV. 14. 



PLATE XIX. 

 Skiagraphs (J) of hands of V. 5. 



REFERENCES. 



1. FoTHKiiiiY. /]riU's/i. Afedic'd Journal, 188C>, \'(i\. \. ]i. DT-'i. 



■2. Anderson. Ibid., 1886, Vol. i. p. 1107. 



3. MuiR. Glasgow Medical Journal, 1884, pp. 420. 



4. Lucas. Ouy's Hospital Reports, Vol. XL. 1880-81, p. 417. 



5. D WIGHT. Variations of the Bones of the Hand and Foot, 1907. 



