PASSERES. 



Fio. 3. 



Fi.r. 4. 



Fis 



Fi" 



3. — Foot of Rook {Trypanocorax frugilegus), dissected so as to show the 

 arrangement of the deep plantar tendons. f.l.h., flexor longus 

 hallucis ; f.p.d., flexor perforans digitorum. (From a specimen in the 

 Museum of the Royal College of Surgeons.) 



4. — Plantar surface of foot of Rook, to show the proportions of the toes 

 in the family Corvidse. (From a specimen in the Museum of the 

 Royal College of Surgeons.) 



Division A. PASSERES ACROMYODI, or OSCINES. 



The intrinsic muscles of the voice-organ fixed to the end of 

 the bronchial scnii-rinos (cf. (rarrod. P. Z. S. 1877, p. 517). 



