188 
PASSENGER TURTLE. 
much duller than those of the male, though the dis- 
tribution is the same. 
Another American species, the Columba Caroli- 
nensis of authors, also belongs to this genus. 
Our next plate represents a beautiful, though di- 
minutive, species, which we have provisionally placed 
under this genus, though it is probable, from its geo- 
graphic distribution, and that of another species dis- 
covered by Freycinet, as well as from some diflfer- 
ences of structure, that it will eventually be found 
the type of a distinct group. It is the 
