182 



MR WM. TURNER ON VARIABILITY IN HUMAN STRUCTURE. 



from the flexor accessorius, the whole of the deep flexor tendon for the second 

 toe ;* it was divided almost equally between the two in six specimens (fig. 4) ; 

 and in two specimens it and the flexor accessorius together formed almost the 

 whole of the deep tendons for these toes, the share taken in their construction by 

 the common flexor being limited to a few fibres (fig. 5). 



Of the eighteen specimens in which the connecting slip went to the second. 

 third, and fourth toes, it contributed a larger share to the second than to either 



Fisr. 5. 



the third or fourth in seven specimens (fig. 6), in one of which the process for the 

 deep flexor tendon of the second toe was much larger than that supplied by the 

 flexor communis ; a larger share to the second and third than to the fourth in five 

 specimens ; a larger share to the second and fourth than to the third in one speci- 

 men ; and about equally to these three toes in the remainder. 



In the solitary specimen in which the connecting slip went to the four outer 

 toes, the subdivisions for the second and third toes were larger than those for the 

 fourth and fifth, that for the fifth being a comparatively slender thread (fig. 7). 



In none of the fifty specimens did the connecting band join the tendon of the 

 common flexor previous to the subdivision of the latter tendon. In every instance 

 it proceeded either single, bifurcated, trifurcated, or in four subdivisions, to its ap- 

 propriate toe or toes, and in its course joined the divisions of the flexor communis, 

 or the portions of the flexor accessorius passing to the same toe or toes. To 

 the deep tendons for the second and third toes, more especially, it not unfrequently 

 contributed quite as much as the flexor communis, and occasionally it and the 

 flexor accessorius together, entirely or almost entirely, were substituted for 



* The flexor communis in this case trifurcated for the third, fourth, and fifth toes. 



t Fig. 3. In this and the succeeding figures, a, is the flexor hallucis longus tendon ; b, the 

 flexor communis digitorum tendon ; c, the flexor accessorius. In figure 3 the flexor communis forms 

 no portion of the deep tendon for the second toe, and after giving a slip to the flexor hallucis tendon, 

 trifurcates for the three outer toes. 



