The =facial panniculus= is pale, thin, and difficult to separate from
the skin.
The =orbicularis oris= is little developed.
The =levator nasolabialis= is thin and pale, and is undivided.
The =levator labii superioris proprius= may well be termed the =levator
rostri=. It has a large penniform belly, which arises in the fossa on
the lacrimal bone and maxilla. The tendon ends on the anterior part of
the os rostri. A muscular slip connects it with the premaxilla.
The =zygomaticus= arises on the fascia over the masseter and ends at the
angle of the mouth.
The =depressor labii inferioris= separates from the buccinator only near
the angle of the mouth; it ends by a number of tendinous branches in the
lower lip.
The =dilatator naris lateralis= is well developed. It arises under the
levator rostri and ends by a tendinous network around the nostril.
The =dilatator naris transversus= is represented only by a few fibers
which cross over the os rostri.
The =depressor rostri= arises on the facial crest. It has a long strong
tendon which passes below the nostril and turns up and inward to meet
the tendon of the opposite side and end in the skin of the snout. It
depresses the snout and contracts the nostril.
The malaris is absent, and the other palpebral muscles present no
special features.