CERCOPITHECUS PETRONELLAE. 8 
want of the white area on the forehead above the black 
tem ple-stripe. 
Of this new species I have seen last spring a living 
specimen in the Zoological Gardens of Antwerp, and an- 
other in the possession of Mr. L. Ruhe at Alfeld, the 
latter was imported, in company with a specimen of C. 
hamlyni, from the Upper Congo and died shortly after 
its arrival at Alfeld. The present specimen will make 
part of the collection of Monkeys in the Leyden Museum. 
Rotterdam, June 23rd, 1911. 
Notes from the Leyden Museum, Vol. XXXIV. 
