188-1.] 



ANATOMY OF SCOPUS UMBRETTA. 



551 



tendon gives off a broad ligament to the ankle, and then becomes 

 fused with the tendon of the flexor perforatus et perforatis of tbe 

 3id digit. 



23. The tibialis aiiticus is made up of two portions : the larger 

 arises from the cuemial crest of the tibia, the smaller from the front 

 part of the outer condyle of the humerus. The two unite to form a 

 strong tendon, which is inserted in the usual fashion. 



Fig. 4. 



n 



Deep plantar tendons of Scopus umhretta. 

 Fl.h, Fexor hallucis ; Fl.2}, flexor profundus digitorum 



24. The extensor diyitorum is a small muscle arising from the 

 crest of the tibia and from the front part of the bone for the space 

 of about an inch ; its tendon supplies all the digits with the exception 

 of the first. 



In the foregoing description of the muscles o{ Scopus, more atten- 

 tion has been paid to those which are known to vary in the different 

 groups of birds. 



In his paper on certain Muscles in Birds ^, Prof. Garrod distin- 

 guished the Pelargi from the Herodiones by the presence in the former 

 of the ambiens muscle, two intestinal caeca, and a double pectoral 

 muscle; in both groups the femoro- caudal', semitendinosus, and 

 accessory semitendinosus were present. In a subsequent paper ^, how- 

 ever. Prof. Garrod stated that the ambiens was not always present in 

 the Storks, since he failed to find it in Xenorhynclius seneffalensis and 

 Abdimia sphenorhyncha ; it is therefore impossible to separate the two 



1 Coll. Papers, p. 221. 



^ Absent in a few Storks, e. g. Leptopiilus argala. 



Coll. Papers, p. 421. 



