268 CETACEA 
various species of their own order, not only the smaller Porpoises 
and Dolphins, but even full-sized Whales, which last they combine 
in packs to hunt down and destroy, as Wolves do the larger 
Ruminants. 
Fic, 95.--The Killer Whale, or Grampus (Orca gladiator). From Hunter. 
Orea citoniensis, of the Italian Pliocene, was of smaller size than 
the existing Killer. Teeth and periotic bones from the Suffolk Crag 
not improbably belong to the same species. 
Psewlorca.1—Teeth about +2. Cranial and dental characters 
generally like those of Orca, except that the roots of the teeth are 
cylindrical. Vertebre: C 7, D 10, L 9, C 24; total 50. First 
to sixth or seventh cervical vertebree united. Bodies of the lumbar 
vertebre distinguished from those of the preceding genera by being 
more elongated, the length being to the width as 3 to 2. Pectoral 
fin of moderate size, narrow, and pointed. Dorsal fin situated near 
the middle of the back, of moderate size, faleate. Head in front of 
the blowhole high, and compressed anteriorly, the snout truncated. 
This genus was first known by the discovery of a skull in a 
sub-fossil state in a fen in Lincolnshire, named by Sir R. Owen 
Phocena crassidens. Animals of apparently the same species were 
afterwards met with in small herds on the Danish coast, and fully 
described by Reinhardt. Others subsequently received from Tas- 
mania were supposed at first to indicate a different species, but 
comparison of a larger series of specimens from these extremely 
distant localities fails to establish any characteristic difference, and 
indicates an immense range of distribution for a species appar- 
ently so rare. The length of this Cetacean is about 14 feet, and 
its colour entirely black. 
Globicephalus.~—Teeth —, confined to the anterior half of the 
rostrum and corresponding part of the mandible, small, conical, 
curved, sharp-pointed when unworn, sometimes deciduous in old 
age. Skull broad and depressed. Rostrum and cranial portion 
about equal in length. Upper surface of rostrum broad and flat. 
' Reinhardt, Overs. Dan. Sezsk, Forh, 1862, p. 151, 
2 Lesson, V. Zab. d. Regne Animal—Mamm. p. 200 (1842). 
