The =serratus anticus= is very thin. It is inserted on the fifth to the
eighth ribs. It may be reduced to two or three digitations or may be
absent. The =serratus posticus= is usually inserted on the last three or
four ribs.
The =transversalis costarum= (Iliocostalis) has a distinct lumbar
portion which is attached to the lumbar transverse processes and the
external angle of the ilium.
The =longissimus= resembles that of the horse, but it is more fleshy
anteriorly, and the spinalis dorsi is clearly distinguishable from the
common mass. In the lumbar region the tendons meet across the summits of
the spines.
=Intertransversales= are present in the back, and =interspinales= in the
back and loins.