MYOLOGY 



115 



Origin. — By a delicate tendon from the base of the pygostyle. 



Insertion. — By a thin, flat tendon upon the outer part of the shaft 

 of the femur below the trochanter and at about the juncture of the 

 upper and middle third of the bone. 



Pig. 24. — Second layer of muscles of the thigh of a cock. Outside view, i 

 Appendico-costales. 2, Levatores costarum. 3, Sacro-lumbalis. 4, Longisst 

 mus dorsi. 5, Intercostales. 6. Longissiraus dorsi. 7, Latissimus dorsi.- 8 

 Femoro-caudal. 9, Edge of obturator externus. 11, Gluteus medius. 12 

 Gluteus minimus. 13, Crureus. 14, Vastus externus. 13, Extensor femoris 

 16, Biceps flexor cruris. 17, Semimembranosus. 18, Adductor magnus. 19, 

 Adductor longus. 20 External abdominal oblique. 21, Depressor coccygis', 

 22, Tibialis anticus. 23, Tibialis posticus. 24, Flexor perforans digitorum pro- 

 fundus. 25, Flexor perforatus medius secundus pedis. 26, Flexor longus 

 hallucis. 



Shape. — Long, narrow, spindle-shaped, flattened from side to side. 



Relations. — Interiorly to the obturator externus, and alon^ the 

 upper border of the long adductors of the thigh and the semi- 

 membranosus. 



Action. — Pulls the tail down and to one side. 



