540 
MAMMALIA. 
zoology, and which appear destined to link together the prin- 
cipal masses, so as to form an uninterrupted chain, extending 
from the most imperfect to the most perfect. The general 
characteristics of this animal assimilate it to the Quadrumana, 
but it also shows its relationship to the Cheiroptera by its 
interdigital membrane, and even in a slight degree to the Insec- 
tivora through its dental system. So that while it approaches 
the Makis in the configuration of its cranium, and the complete 
similitude of its reproductive organs, it is allied to the Bats 
Fig. 234.— Colugo ( Galeopithecus volans). 
by the possession of a membrane enveloping it laterally, from 
the neck to the end of the tail, and which, being attached to the 
extremities of the four limbs, plays the part of a parachute, per- 
mitting the creature to sustain itself in the air for even a longer 
time than the Flying Squirrels. This membrane is hairy, and of the 
same colour as the body ; it forms quite a palm between the digits 
of the fore and hind quarters, which are all directed the same way, 
and are therefore unsuitable for prehension. The nails are narrow, 
