False Batesian Mimicry 
both are arboreal and about the same size, and 
this lemur’s colouration is exceptional in its 
family. 
The banded Duiker-buck of West Africa 
(Cephalophus doriae), has the same very unusual 
colouration as the thylacine or marsupial wolf of 
Tasmania, light brown, with bold black bands 
across the hinder part of the back, and the 
animals are about the same size. 
The dormouse of Europe closely resembles a 
small American Opossum (Dzdelphys murina), 
and a larger opossum (D. cvasszcaudata) is very 
like the Siberian Mink (Mustela szbzrica). 
The Flying Squirrel of North America(Sczuvop- 
terus volucella) is closely copied by the Flying 
Phalanger (Petaurus breviceps) of Australia. 
It will be readily seen that in no one of these 
cases can the likeness be of utility to either the 
“model” or the “ copy.” 
Fause Batestan Mimicry AMONG BIRDS 
There are many instances of this phenomenon 
among birds. The New Zealand Cuckoo (Uvo- 
dynamis tritensts) shows a far closer resemblance 
to the American Sparrow-hawk (Acczpzter coopert) 
than to any New Zealand hawk, and in fact 
closely mimics this quite alien bird. 
The stormy petrel, a purely oceanic bird, 
closely resembles in size, colour, and style of 
flight the Indian Swift (Cypselus affinzs), a purely 
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