2. The extensor caudæ lateralis ([p. 137], and [Fig. 70], f). Uncover this by cutting the lumbodorsal fascia over the sacral region.
3. The iliocostalis ([p. 128], and [Fig. 69], h). Uncover this completely; note its connection with the longissimus dorsi at the caudal end. Dissect apart some of its muscle-bundles, to see origin and insertion.
4. The splenius ([p. 131], and [Fig. 73], b). Transect this by an incision beginning at its lateral border about four centimeters from the cranial end of the muscle and extending obliquely craniodorsad to the craniomedial angle of the muscle. Be careful not to injure the longissimus capitis ([Fig. 73], g).
5. The longissimus capitis ([p. 131], and [Fig. 73], g). Transect.
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.
9. The longus atlantis ([p. 134], and [Fig. 71], f).
10. The multifidus spinæ ([p. 130], and [Fig. 70], d). Remove a part of the longissimus dorsi in the lumbar region, and trace the course of the fibres of the multifidus spinæ. (If desired the entire longissimus may be removed and the multifidus spinæ completely uncovered.)
11. The extensor caudæ medialis ([p. 136], and [Fig. 70], e).