CERCOCEBUS 261 



Measurements. Total length, 1,450; tail, 535; foot, 170. Skull: 

 total length, 141.5; occipito-nasal length, 119; intertemporal width, 

 47.4; width of braincase, 68.2; Hensel, 54.5; zygomatic width, 90.7; 

 median length of nasals, 37.5 ; palatal length, 56.5 ; length of upper 

 molar series, 36.4; length of upper canines, 23.1 ; length of mandible, 

 96 ; length of lower molar series, 44.3. 



Great confusion has existed in the nomenclature of this and the 

 next species arising from two causes, one, the vain efforts of Authors 

 to employ the Linnasan name cethiops, which was given to an unde- 

 terminable species of Lasiopyga, for this or the following species, and 

 the other, the ignoring of Schreber's name ccthiops, bestowed upon the 

 Mangabey, called by E. Geoffroy some thirty-two years later, 

 fuliginosus. As I show in the review of the Linnasan literature of 

 Lasiopyga, Siniia ccthiops Linn., must be ruled out of court, as having 

 no standing, for although it probably belongs to the Petaurista or 

 ..Ethiops groups in that genus, yet the species it represents is quite 

 undeterminable. 



Bates, states (1. c.) that, in southern Cameroon, "Monkeys of this 

 species are not rare, but are often killed. They differ from those of 

 the common kind in that they often descend to the ground to feed. 

 Their call is very different from that of the Cercopithecus, (Lasio- 

 pyga), monkeys. It is rather shrill and ends in an after sound like 

 that made while drawing in the breath or gasping." Kerr was the first 

 to bestow a Latin name on this species, founding it on the "Mangabey 

 d, collier blanc" of Buffon and called it Simla cethiops torquata. 



Ceecocebus ^thiops (Schreber). 



Simla wthiops (nee Linn.), Schreb., Saugth., I, 1775, p. 105, pi. 

 XX ; Audeb., Hist. Nat. Singes et Makis, 1799, Fam. IV. Sec. 

 II, pi. X. 



Cercocebus fuliginosus E. Geoff., Ann. Mus. Hist. Nat. Paris, 

 XIX, 1812, p. 97 ; I. Geoff., Cat. Primates, 1851, p. 25 ; Wagn., 

 Schreb., Saugth. Suppl., V, 1855, p. 125, tab. XX; Gray, 

 Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 

 1870, p. 27; Schleg., Mus. Pays-Bas, Simise, 1876, p. 95; 

 Sclat., Proc. Zool. Soc. Lond., 1878, p. 791; Ottley, Proc. 

 Zool. Soc. Lond., 1879, p. 125; Anders., Cat. Mamm. Ind. 

 Mus. Calc, Pt. I, 1881, p. 59; Forbes, Handb. Primates, II, 

 1894, p. 37; Bedd., Proc. Zool. Soc. Lond., 1904, p. 161; 

 Elliot, Cat. Mamm. Field Columb. Mus., F. C. M. Pub., VIII, 



