Tibet Dog
or TIBET MASTIFF, a variety of Canis familiaris, about the size of a Newfoundland dog, but with a head resembling that of the mastiff, and having the flews large and pendent. The color is usually deep black, with a bright brown spot over each eye; the hair is long, and the tail bushy and well curled.
This variety is extremely savage, and has been known from classic times, when it was employed by the Romans, especially under the emperors, in the games of the circus.
TIBULLUS