The former thus constitute the order Sirenia, while the latter belong to the Cetacea.
"On the Genesis of Species" by St. George Mivart
Sirenia, which also includes the manatees.
"The New Gresham Encyclopedia" by Various
The manga belongs to the small but singular group of animals classed as SIRENIA.
"Lost in the Jungle" by Paul Du Chaillu
SIRENIA, nakedness of, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
The Sirenia, too, are comparatively hairless, as are also many Ungulates.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard