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210 GEOGRAPHICAL ZOOLOGY. [part IV.
extinct whales and dolphins having been described, most of them
belonging to extinct genera.
The Zeuglodontidie, an extinct family of carnivorous whales,
with double-fanged serrated molar teeth, whose affinities are
somewhat doubtful, are found in the older Pliocene of Europe,
and in the Miocene and Eocene ot the Eastern United States.
Zcuglodon abounds in the United States, and one species reached
a length of seventy feet. A species ot this genus is said to have
been found in Malta, Squalodon occurs in Europe and North
America ; and in the latter country four or five other genera have
been described, of which one, Saurocetes, has been found also at
Buenos Ayres.
Order VI.—SIBENIA.
Family 42.—MANATIDiE. (3 Genera, 5 Species ?)
Neotropical
sub-reoions.
Neaectic
Sub-regions.
— 2-4 1
General Distribution.
Pal.«;arctic
Sub- REGIONS.
Ethiopian
Sub-regions.
Oriental,
Sub-regions.
1 .2 1 .2— 4
Australian
Sub-regions.
The Sea-cows are herbivorous aquatic animals living on the
coasts or in the great rivers of several parts of the globe. Ma-
nahis (2 species) inhabits both shores of the Atlantic, one
species ranging from the Gulf of Mexico to North Brazil, and
ascending the Amazon far into the interior of the continent
while the other is found on the west coast of Africa, Halicore (2
species ?), the Dugong, is peculiar to the Indian Ocean, extending
from Mozambique to the Eed Sea, thence to Western India and
Ceylon, the Malay Archipelago and the north coast of Australia.
Bytina (1 species), supposed to be now extinct, inhabited re-
cently the North Pacific, between Kamschatka and Behring's
Straits.
Fossil /Sfimim.—Extinct species of Manatus have been found
in the Post-pliocene deposits of Eastern North America from
;