6. The spinalis dorsi (p. 129, and Fig. 69, _g_). Separate some of its
muscle-fibre bundles and trace to origin and insertion.
7. The biventer cervicis (p. 132, and Fig. 69, _a_). Raise its lateral
border, turning it toward the middle line, and transect it near its
caudal end.
8. The complexus (p. 133, and Fig. 69, _b_). Raise its medial border,
and transect it near its cranial end.