Habitat, Rio Janeiro.
DESCRIPTION.—Head semi-oval, depressed, as broad as it is long. The
muzzle truncated, extending beyond the lips, which it overhangs.
Tongue oval, entire, free at the posterior margin. Palatine teeth
in two parcels on each side; one consisting of very few at the
anterior and inner margin of the posterior nares, the other behind
those openings, in the angle formed by the maxillary arch and the
orbits. Posterior nares large and oval. Tympanum conspicuous,
nearly circular. Skin every where perfectly smooth, without glands
or pores. Anterior legs of moderate length and size. The fore-arm
rather longer than the upper arm. Fingers of moderate length,
wholly detached. Hinder legs little more than one-third longer
than body. The toes separate, excepting a slight rudiment of a
connecting membrane at their base, which extends, though very
narrow, along their sides, the extremity very slightly notched.
COLOUR of the upper part rich dark brown. The thighs lighter,
obscurely banded with dark brown. Under parts pale blueish grey.
The throat dotted with brown.
DIMENSIONS.
Inches. Lines.
Length of the head and body 1 4
of the anterior extremities 0 7
of the posterior extremities 1 8
Found in brooks at Rio Janeiro by Mr. Darwin, who states that it is
infested with acari; and I observe, in the specimen under examination,
several marks in the skin, from whence these have been taken.
GENUS—CYSTIGNATHUS. _Wagler._
CYSTIGNATHUS GEORGIANUS. _Bibr._