The type-species (D. giganteum) is calculated to have attained the length of 18 feet.
The type-species of this genus is the Negro Cynopithecus, who is wholly black, and a little smaller than the Baboon.
The type-species was originally found in N. America but has since been taken in several localities in continental Europe.
To recognise the identity of phenomena which thus differ only in degree, we must assume a type-species.
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