1873.] 



CERTAIN MUSCLES OF BIRDS. 



Fig. 3. 



635 



Outer view of left thigh of Neophron percnopterus, partially dissected. 

 s, sartorius ; q, quadratus femoris ; gl, glutei ; b o and b i, biceps, origin and in- 

 sertion ; fc, femoro-caudal ; s m, semimembranosus ; o e, obturator externus ; 

 P, pubis ; B, rectrices. 



The Strigidee possess the femoro-caudal, which is always small ; 

 the ambiens, the accessory femoro-caudal, the semitendinosus, the 

 accessory semitendinosus, and the postacetabular portion of the 

 tensor fasciae are absent. 



Species examined. 



Strix flammed. Bubo fasciolatus. 



Otus vulgaris. Ketupa javanica. 



brachyotus. Scops zorca. 



Syrnium aluco. Athene noctua. 



nebulosum. passerina. 



Bubo maximus. brama. 



- ■ virginianus. Pholeoptynx cunicularia. 



bengalensis. Glaucidium, sp. 



capensis. Pulsatrix torquata. 



po'ensis. Surnia funerea. 



The Steganopodes must be considered in separate families. I have 

 not dissected Pelecanus. 



