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 shrivelling 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 Pero- 

 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. 



