1891.] 



ANATOMY OF THE KAGU. 



17 



only one visible on an anterior aspect of the tibia ; it arises from the 

 crest of the tibia, from the fascia covering the tibialis anticus on its 

 upper part, from the septum between itself and the head of the 

 gastrocnemius, and from that between itself and the extensor com- 

 niunis ; its long tendon, as appears to be invariably the case with 

 birds, is attached to that of the flexor perforatus of digit ii. 



Fig. 3. 



G-astrocneinius of Ehinochetus, dissected to show its connection with 

 the Seniiteudinosus. 



St, Semitendinosus ; A, its accessory head ; Sm, Semimembranosus. 



(11) The Peroneus brevis arises from the fibula ; its tendon passes 

 below that of the peroneus longus and is attached to the metatarsals 

 on the outer side. This muscle is wanting in Ardea and Ciconia, 

 but is present in Grus. 



(12) The Tibialis anticus lies beneath the Peroneus longus ; it 

 arises from two heads — the upper and larger from the crest of the 

 tibia, from the fascia covering the knee, and from the septum between 



Proc. Zool. Soc— 1891, No. II. 2 



