Tasmanian tiger
From Tardis Wiki, the free Doctor Who reference
The Tasmanian tiger — also known as the Thylacine or, formally, Thylacinus cynocephalus — was a small, doglike marsupial mammal. According to The I-Supder Book of Earth Creatures, it had "a smooth brown coat with black or darker brown stripes on its rear." A third of its 160cm length was given over to its tail alone. As in many mammals, males were generally larger than females.
It was worth 250 points in the I-Spyder "game" if it was spotted. (NSA: The Last Dodo)
