176 Proceedings of the Boyal Physical Society. 
Hoeven's Genus Stenopsy are inhabitants of Asia, the East 
Indies, &c. Van der Hoeven, in his description of this 
species, the Stenops potto or Aposou, says — " The Aposo or 
Aposou of the negroes of the Gold Coast of Guinea is a noc- 
turnal animal, which sleeps on trees and lives on fruits. The 
spinous processes of the last five cervical and of the first two 
dorsal vertebrse are long, and pierce through the hairy in- 
tegument of the back, with a weak, horny covering. Professor 
Halbertsma first drew my attention to this peculiarity, which 
I have observed in two specimens." 
On referring to the description of this same species (the 
Potto), placed under the Genus Perodicticus, and named 
P. Geoffroyi, by Mr E. T. Bennett, which is published in 
the " Proceedings of the Committee of Science of the Zoo- 
logical Society of London," for 26th July 1831 (Part I., 
1830-31). I find the animal now exhibited agrees with 
the general characters given there of the Genus (correcting 
the mistake of considering the projecting teeth in the front 
of the lower jaw as being all incisors, instead of both inci- 
sors and canines, according to the present view; and there- 
fore the incisors only four in number, and not six, as Mr 
Bennett described them). To which I would add, as addi- 
tional characters of the Genus Perodiciicus — tail short, or 
very short; index of hand very short, resembling an un- 
armed tubercle — supported hy small metacarpal hone, and 
only TWO small phalanges. The A ngwdntiho seems to differ, 
however, from the details given of the species which he 
describes, — the measurements of the Potto, or P. Geoffroyi, 
given by Bennett, being, " length of head 2 inches and y^ths, 
of the body 6 inches; of the tail 1 inch i^ths, or, including 
the hair, 2 inches i^oths ;" whereas, in my specimen, the whole 
length, from point of muzzle to extremity of tail, is about 
lOJ inches ; the tail being only ^ of an inch in length, or, 
including the hair, which is about J of an inch long, only J 
an inch. The animal described by Bennett was immature, 
its dentition not being perfect ; in the one now exhibited, 
the dentition is perfect. There seems to be other slight dif- 
ferences between the Potto and the Angwdntiho, in the 
colour of the hair as well as in the relative size or proper- 
