Table 3.

Comparative table of the nasal muscles attachment of Eubalaena australis and Balaenoptera acutorostrata (according to Carte & MacAlister, as tabulated by Allen, 1916: 264)

	Eubalaena australis		Balaenoptera acutorostrata
Muscle	Origin	Insertion	Origin	Insertion
M. dilator naris superficialis	Rostral surface of the descending process of the maxilla and lateral surface of the maxilla	Median raphe of premaxilla and rostral tip of the premaxilla along the midline	Rostral border of maxilla from tip to jugal	Outer lip of nares and median raphe of rostrum
M. dilator naris profundus	Caudodorsal region of the maxilla and premaxilla	Rostral to the blowhole	Not reported	Not reported
M. constrictor naris	Lateral margin of the nasal fossa formed by the premaxilla	Outer margin of the blowhole	Rostral ‘edge of temporal fossa’, here interpreted as probably the crest on the maxilla dorsal to the posterior maxillary concavity	Outer lip of nares and median raphe of rostrum
M. retractor alae nasi	Caudal region of the medial nasal cartilage	Caudal surface of the lateral nasal cartilage, and caudal margin of the m. constrictor naris	Rostro-lateral portion of frontal	Cartilaginous lateral and caudal lip of nares
M. depressor alae nasi	Rostral-most end of the nasal fossa in the medial and ventral surfaces of the premaxilla	Medial nasal cartilage, and the epidermis of the nasal plug	Premaxilla and median raphe of rostrum	Outer margin of nares