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ANATOMY OF THE DOMESTIC FOWL 



Insertion. — To the four inner quill butts of the main tail feathers. 



Shape. — Long, spindle-shaped. 



Relations. — Internally, with the levator coccygis and externally, 

 with the laterahs caudae. 



Action. — Powerfully elevates the four inner main tail feathers. 



Transversus Peronei (Fig. 23, No. 3). Location. — The posterior 

 abdominal region. 



Pig. 23. — Outer layer of muscles of the tail and thigh, i, Rectus abdominis. 

 2, Levator coccygis. 3, Transversalis peronie. 4, Levator caudae. 5, Lateralis 

 caudas. 6, Depressor caudae. 7, Sartorius. 8 and 9, Gluteus primus. 10, 

 Semitendinosus. 11, Gastrocnemius. 12, Peroneus longus. 13, Plexor per- 

 foratus indicis secundus pedis. 14, Flexor perforatus medius secundus pedis. 

 15, Lateral ligament of the hock. 



Origin. — From the entire posterior margin of the ischixmi, and 

 from the posterior margin of the post-pubis extending beyond it. 



Insertion. — Becoming aponeurotic, it passes toward the coccyx 

 and is attached to the entire posterior margia of the ilium. Passes 

 to the median line, meeting its fellow in front of the anus. 



Shape. — ^Thin, sheet-Uke. 



