He was surnamed Cursor from his swiftness of foot.
The speed with which it bounds upon its prey, when loosed from the cart, exceeds the swiftness of any other mammal.
The swiftness, the strength and the highly developed power of scent in the dog, have made it a powerful ally of man against the other animals; and perhaps these qualities in the dog were necessary to the establishment of society.
The specific name was given on account of the extraordinary swiftness of the animal.
of New Zealand, p. 362): "The kiwi is in some measure compensated for the absence of wings by its swiftness of foot.