68 BALENOPTERA. 
Note.—Gray’s M. nove-zealandie may be a good species, but, 
according to Prof. Flower, no distinctive characters have as yet 
been defined. 
Genus IV.—BALAINOPTERA, Lacépéde (1804). 
Skin of throat plicated. Head small, flat, and pointed in front. 
Body long and slender. A small falcate dorsal fin. Fore limbs 
small, narrow, and pointed; tetradactylous. Baleen short and 
coarse. Cervical vertebre free. Scapula low and broad with the 
acromion and coracoid process large. 
Vertebre.—C. 7, D. 12, L. 13, Cd. 16; total 48. 
1. BALHNOPTERA HUTTONI, Gray (1874). 
Sulphur-bottom. 
Dark green above, shading off gradually to yellowish-white 
below. Baleen yellow with a narrow black margin. 
Dimensions.—Up to thirty feet ? 
Habitat.—Seas of New South Wales and New Zealand. 
References.—Gray, Ann. Nat. Hist. (4) 1874 xxxi. p. 316, pl. 
xvi. (animal) and p. 450, pl. xviii. 
Note.—This is possibly identical with the Northern B. rostrata. 
Suborder II.—Odontoceti. 
Calcified teeth always present after birth, generally numerous, 
but sometimes a limited number, or even in rare cases none, are 
functional. No baleen. Upper surface of skull moe or less 
asymmetrical. Nasal bones in the form of nodules or flattened 
plates, closely applied to the frontals, and not forming any part 
of the roof of the narial passage, which is directed upwards and 
backwards. Olfactory organ rudimentary or absent. Posterior 
end of maxilla’ expanded, covering the greater part of the orbital 
plate of the frontal bone. Lachrymal bone either inseparable 
from the jugal, or, when distinct, very large and forming part of 
the roof of the orbit. Tympanic bone not anchylosed to the 
periotic, which is usually attached to the skull by ligament only. 
Rami of mandible nearly straight, much expanded in height 
posteriorly, with a wide funnel-shaped aperture to the dental 
canal, and coming in contact in front by a flat surface of variable 
length, always constituting a true symphysis. Several of the true 
ribs with well-developed capitular processes, which articulate with 
the bodies of the vertebre. Sternum almost always composed of 
several pieces, placed one behind the other, with which several 
pairs of ribs are always connected by the intervention of well- 
developed cartilaginous or ossified sternal ribs. External respira- 
tory aperture single, the two nostrils uniting before they reach 
