The =coccygeal nerves= (Nn. coccygei) commonly number five pairs. Their
dorsal and ventral branches anastomose to form respectively two trunks
on either side, which extend to the tip of the tail and supply its
muscular and cutaneous nerves. The dorsal trunk runs with the
dorso-lateral artery between the sacro-coccygeus dorsalis and
intertransversales muscles (Fig. 454). The ventral trunk accompanies the
ventro-lateral artery below the intertransversales.