Generic Names of certain Old- World }[onkeyr,. 179 



prevalent Avliifencs.s of tlie tiiil, the cfToct of wliicli must 1)6 to 

 ii'iuler the animal comj)aratlvely vi.sil)lc, especially at night. 

 In view of the existence in all montjooses o£ an anal sack 

 and foul-smelling secretion of the anal ghuuls, coupled with 

 the known power in the case of Mangos tirva* of ejecting 

 this secretion to a distance, as in the skunk, I suggest that 

 tlie whiteness of the tail may be a warning attribute ; and 

 since hhneuviia geographically overlaps DdeOijale to the 

 north and Paran/nictis to the south, the likeness between 

 the three may, perhaps, be Miillerian. , 



Note on Galeriscus. 



In 1894 M-. F. J. Jaekson sent to the British Museum 

 the skin, without the skull, of a Carnivore from Mianzini, in 

 in Masailand. This was described by M\\ Thomas f as a 

 new genus and species, Galeriscus jacksoni, which was 

 assigned to the Mustelidas, and compared more particularly 

 with the South-American genus Galictis, now known as 

 Grison. Mr. Thomas subsequently came to the conclusion 

 that the specimen must be referred to BdeogaJe — a view 

 iullv confirmed by the structure of the ear, which is like that 

 of Mangos rather than of Grison. Since I am not aware 

 that this correction has ever been published, I take this 

 occasion to point out that Galeriscus falls as a synonym 

 of Ddeogale, 



XV. — On the Getieric Names of certain Old-lVorhl Monkeys. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British ^Euseum.) 



The generic names used for some of the Old- World monkeys 

 have of late years been in a state of continual incertitude, 

 so that for the langurs Presbytis, Pijgathrix^ and Semno- 

 pithecus have been used by different authors for different 

 reasons, for the macaques Simla, Pitliecus, and Macacits, 

 and for the guenons Cercopitliecus and Lasiopyga — not to 

 mention the use of such little-known names as Pan and 

 Pongo for the chimpanzees and orangs. 



The question of Pitliecus has recently been again brought 



* Ann. & MafT. Nat. Hist. (8) viii. p. 75G (1911), 

 t Ibid. (G) xiii. p. 5:22 (1894). 



