Page:The Zoologist, 3rd series, vol 2 (1878).djvu/25

Rh

The members of this genus, which includes the Greenland and Atlantic Right Whales, are characterized by the absence of any dorsal fin, and by having the skin of the under parts perfectly smooth, instead of being pleated or disposed in folds, as in the Fin Whales, or Rorquals. The rostrum of the skull is compressed and rounded, and the rami of the lower jaw strongly arched outwards. The baleen, or whalebone, is long; the flippers short.