Specific Names of certain Primates. 619 



According to Mr. Pocock there are two subspecies — C.p.wkytei, 

 with whiskers completely concealing the ears and very con- 

 spicuously banded ; and C. p. centralis, with whisker-hairs 

 comparatively short, not concealing the ears, and indistinctly 

 banded. The characters assigned to the last agree very well 

 with Cuvier's figure and description of pygerythrus, and also 

 with the short description by I. Geoffroy in his " Synopsis." 

 C. p. centralis is from Central Africa, and that seems to be 

 the habitat presumed for pygerytkrus by I. Geoffroy when he 

 says : — 



"La presque identite du pelage du C. pygerythrus avec 

 celui du G. sabosus qui habite le Senegal, et celui du G. griseo- 

 viridis [= C. aithiops], qui habite la Nubie et le sud de 

 PEgypte, indique a elle seule une analogie tres grande dans 

 la zone d'habitat de ces trois especes " *. 



Of course, the area inhabited by centralis was quite unknown 

 to Europeans in Cuvier's time, but I think it not impossible 

 that an isolated specimen reached Mombasa or the Somali 

 coast from the interior of the country through native trade. 

 The total ignorance about the origin of the type specimen 

 of pygerythrus and the fact that it was for many years the 

 only red-vented Cercopithecus with green hair known to natu- 

 ralists seem to indicate that it came from a country unknown, 

 or almost so, to white men. 



To sum up, I give the synonymy of both the green and 

 the grey forms, according to my views : — 



Cercopithecus pygerythrus (F. Cuvier). 



1821. Simia pygerythra, F. Cuv. Hist. Nat. des Mammif. livr. xxiv. 

 pi. xxiii. 



1822. Cercopithecus pyyerythreus, Desmar. Mammal., Suppl. p. 534. 

 1829. Simia erythropyya, Cuvier, Regn. Anim. sec. 6dit. p. 92. 



1833. Cercopithecus pyyerythrus, F. Cuv. Hist. Nat. des Mammif. 



sec. 6dit. 

 1900. Cercopithecus centralis, Neumann, Zool. Jahrb. Syst. xiii. p. 533. 

 1904. Cercopithecus cethiops centralis, Thomas, P. Z. S. 1904, i. p. 459. 

 1907. Cercopithecus pygerythrus centralis, Pocock, P. Z. S. 1907, 



p. 739. 



Cercopithecus pygerythrus pusillus (Desmoulins). 



(?) 1797. Simia sabcea, var. a, Audebert, Hist. Nat. des Singes, fain. iv. 



sect. ii. rig. 5. 

 1811. Cercopithecus glaucus, Lichtenst. Reis. Siidl. Africa, i. p. 507 



[nomen nudum]. 



* Voy. Venus, p. 10. 



41* 



