166 ALLEN’S NATURALIST’S LIBRARY. 
of the limbs pale grey; the hands and feet black ; tail red, 
the hair bushy at its base. Length of the body, 14 inches; of 
the tail, 1344 inches. ( Weldon.) 
Czecum with dilated end; liver more divided than in C. 
moloch ; the two halves (vamz) of the lower jaw enormously 
deep, resembling those of the Howlers (JZyceées). 
Distribution Brazil ; Bahia, and the country between the 
Parahyba and the mountains to the north of the Bay of Rio 
de Janeiro. 
Habits.—This species is very rare, and nothing is known of 
its habits. 
Professor Weldon writes, in his paper in the ‘ Proceedings 
of the Zoological Society,” referred to above: ‘Sir W. Flower 
has suggested to me that the enormous depth of the zamus of 
the mandibles in this Ca/ithrix pointed to the existence of 
some arrangement resembling that of AZycetes. It was difficult 
to determine this point in a young female; but the swollen 
condition of the thyroid, together with the existence of a patch 
of ossification on each side, seem to show the possible existence 
of a howling apparatus in the male.” 
THE DOUROUCOLIS. GENUS NYCTIPITHECUS. 
Nyctipithecus, Spix, Sim. et Vespert. Bras., p. 24 (1823). 
The members of this genus, usually called “ Douroucolis,” are 
small animals, somewhat Lemurine in appearance, possessing a 
short, thick body, a rounded head produced behind, and a 
short, round face, encircled by a ruff of whitish fur. The 
muzzle is not prominent ; the mouth and chin are small ; the 
