28 ALLEN’S NATURALIST’S LIBRARY. 
longer than the fore-limbs ; hands smaller than the feet ; thumb 
thick, with a tubercle at base; the wrist-bone of the very 
rudimentary index-finger supporting two rudimentary finger- 
bones ; third finger not parallel to fourth and fifth ; the fourth 
longest (Fig. 7). Great toe with a tubercle at its base, oppos- 
able. ‘Tail 4 inch long, hidden in the fur of the body. 
Fur grey at base of hairs, fawn-coloured farther up, and 
tipped with dark brown, uniform over the body and limbs ; face 
darker ; sides of head lighter ; line from brow down the nose 
white. No vibrissz on face and no eyebrows ; chin, throat, 
inner surface of limbs, and under side of body, greyish-white. 
Posterior upper molar nearly equal to posterior pre-molar, 
with the hind inner cusp of the crown rudimentary. Lower in- 
cisors: not visible beyond the lip, cingulate ; posterior molar 
five-cusped and relatively larger than in the next species (P. 
fotto). Bony palate with large perforations behind the incisors. 
Intestines, 40 inches long ; caecum, 2% inches. 
Distribution.—The ‘‘ Angwantibo,” as this species is called, is 
known only from Old Calabar, on the west coast of Africa. 
II. BOSMAN’S POTTO. PERODICTICUS POTTO. 
Potto,Bosman, Beschrijving van de Guinese Goudkust, il., p. 32, 
fig. 4 (1704). 
Nycticebus potto, Geoffr., Ann. Mus., xix., p. 165 (1812); 
Schlegel, Mus. Pays Bas vii., p. 287 (1876). 
Perodicticus geoffroyt, Bennett, P. Z. S., 1830, p. 109. 
Perodicticus potto, V. der Hoeven, Tijdschr. v. Natuurl. Gesch., 
xi., p. 41 (1844) ; Wagner, in Schreber’s Saugeth. Suppl, 
v., p. 183 (1855). 
Stenops polto, Pel, Bijdragen tot de Dierkunde, 1852, p. 41. 
Characters—More common than the Angwantibo and dis- 
