120 



Mr. P. C. Mitchell on the 



only a narrow vinculum connects the two tendons. In 

 Dacelo (fig. 17, I.) and Sauropatis, and especially in the 

 diastataxic as contrasted with the eutaxic Ceryles (fig. 17, 

 II. and III.), the communis retains a more strong hold on the 

 third and fourth digits by means of a branching vinculum, 



3 4 



Deep plantar tendons of Kingfishers. 

 I. Dacelo yigantea. VI. Cittura. 



II. Ceryle vuixima. VII. Halcyon pileata. 



III. alcyon. VIII. riifa. 



IV. americana. IX. Ceyx rujidorsa. 



V. inda. X. Alcedo. 



In all the communis tendon (plain) is to the left, and the hallucis tendon 

 (dotted) is to the right. The vinculum is striped. In all the tendon 

 for the hallux is to the left (1), and the tendons for digits 2, 3, and 

 4 follow towards the right. (2) is missing in Ceyx. 



so that in these Kingfishers the peculiarity is not so acutely 

 marked. 



Garrod made the interesting observation that when a 

 vinculum is present it runs down from the hallucis to the 

 communis, with the result that the hallux cannot be flexed 

 without at the same time flexing the other digits by the pull 



