5. The iliocaudalis ([p. 137], and [Fig. 162], 11′).
6. The levator ani ([p. 269], and [Fig. 162], 11).
Remove with great care the levator ani and iliocaudalis of one side, by cutting first the attachment to the symphysis and the ilium, turning the muscle mediad, then cutting the attachment to the tail. There are thus exposed on the lateral wall of the thorax the medial surface of the obturator internus, craniad of it the pyriformis, caudad of it the quadratus femoris. Dorsad of these is the abductor caudæ internus.
7. The abductor caudæ internus ([p. 137]).
On the ventral surface of the tail are exposed the following:
8. The flexor caudæ longus ([p. 138], and [Fig. 162], 12).
9. The flexor caudæ brevis ([p. 138], and [Fig. 162], 13).
X. Muscles of the Tail ([p. 136]).
By removing the skin of the tail, all the muscles of the tail are now easily seen.
1, 2, 3, 4, 5—see [5, 6, 7, 8, 9], above (IX).