The Collaborative International Dictionary
miller's dog
Tope \Tope\, n.
(Zo["o]l.) A small shark or dogfish ( Galeorhinus galeus syn. Galeus galeus), native of Europe, but found also on the coasts of California and Tasmania; -- called also toper, oil shark, miller's dog, and penny dog.
(Zo["o]l.) The wren. [Prov. Eng.]