On the Angwantibo of Old Calabar. 187 
cooling of the body of the animal, has been believed to be 
peculiarly adapted as a covering for animals inhabiting cold 
climates ; it seems, however, to be not inappropriately found on 
this little animal, which is stated to search for its food by 
night, and is therefore exposed to the damp and cold which 
occur at night in even a tropical forest. 
Annexed is Dr Wright's detailed description of Plate VIII. 
Description of Plate VIII. 
Fig. 1. Proximal portion of small hair in water, showing the recurrent 
spines. 
2. Middle portion of small hair in water, showing hour-glass-shaped cells, 
one-half of which is occupied by pigment, the other by the nucleus 
and vacuolated " cell contents." Diameter about '001 inches. 
3. Summit or solid portion of large hair, showing contracted scales. 
4. Upper part of large hair in turpentine, showing dark spaces filled 
with air, formed by the slirivelling of the cell contents, of single 
and double row of cells. Diameter about •006 inches. 
5. Middle or broadest part of large flat hair in water, showing single 
layer of cells, with nucleus and vacuolated cell-contents. Diameter 
•009 inches. 
The Society may think I have entered rather too much into 
minute details of description. My reason for doing so, is to 
leave no doubt on the mind of any one, who may wish to make 
comparisons between this Angwantibo and any other indivi- 
dual of the genus, as to the special animal I have attempted to 
describe ; and, for preservation, it is my intention to deposit the 
specimen in the Natural History Museum of the University. 
Since the preceding pages were in type (various unavoidable 
circumstances having delayed the publication of these Proceed- 
ings), I have been fortunate enough to get this specimen of 
the Angwantibo, and my detailed description, compared with 
the Potto described by Mr Bennett ; and also with other speci- 
mens of the Potto in the collections of the British Museum — 
my friend, Mr William Carruthers, of the Botanical Depart- 
ment of that great national institution, having, at my request, 
kindly taken the trouble of examining them. 
Mr Carruthers informs me I am correct in my opinion of the 
Angwantibo being a distinct species from the Potto, the P^ro- 
dicticus Geoffroyi of Bennett ; and also that it is a species 
apparently unknown to naturalists. I am therefore at liberty 
to designate it the Perodicticus Calabarensis. 
