It's the tailless cat variety from an island south of Scotland
The island became known for tailless cats, and that is how the breed got its
... [DOC] [TLE] Manxes - info and games - Sheppard Software [PAR] Docking tails on cats is not exclusively performed on the Manx breed; it can be ... 
in the short-hair division with short-haired cats even though its hair is longer.