RHINOSTIGMA 273 



GENTJS VII. ^RHINOSTIGMA. OWL-FACED GUENON. 



.2-2 p 1^:1. p ?::?. ivi *='=« 



A- 2— 2> ^- 1— 1> ^' 2—2' ^"- 3—3 •> 



White line from forehead over nose and lip to mouth. Shape of 

 face elongate ovate, similar to that of the Barn Owl. The last lower 

 molar, with a posterior fifth cusp. Facial line of skull hollowed ; pre- 

 maxillaries protuberant ; zygomatic arch slightly above alveolar border 

 of molars. 



RhINOSTIGMA HAMLYNI (PoCOck). 



Cercopithecus hamlyni Pocock, Ann. Mag. Nat. Hist., XX, 7th 

 Ser., 1907, p. 521 ; Id. Proc. Zool. Soc. Lond., 1908, p. 160, pi. 

 X, fig. 3. 



HAMLYN'S OR OWL-FACED GUENON. 



Type locality. Ituri forests, Congo State, Africa. Type living 

 in the Gardens of the Zoological Society of London, (1909). 



Color. A white stripe from forehead down nose and across upper 

 lip to mouth; a pale yellowish superciliary stripe tinged with gray; 

 whiskers long extending to ears bushy, and with top of head and 

 entire upper parts black speckled with yellow ; thighs gray ; arms, legs 

 and entire under parts black ; tail very long, gray, hairs being black 

 tipped with silvery white ; hands and feet black ; face lead color ; ears 

 yellow. Ex type living in Gardens of the London Zoological Society. 



Measurements. Skull : total length, occiput to base of incisors, 

 105; occipito-nasal length, 92; intertemporal width, 50; Hensel, 64; 

 zygomatic width, 68 ; median length of nasals, 16 ; palatal length, 37 ; 

 length of upper molar series, 28; length of mandible, 68; length of 

 lower molar series, 31. Incisors very large in both jaws. Ex type 

 Tring Museum. 



I am indebted to the Hon. Walter Rothschild, and Dr. Hartert 

 who very kindly forwarded the type skull to me for examination from 

 the former's Museum, at Tring, England. 



In size this monkey is about equal to C. albigularis. It is a 

 remarkable species both for the long stripe down the nose and lip, as 

 well as for the peculiar shape of the face, which is broad at the fore- 

 head and narrowing down to the chin, like that of the barn owl, the 



*pivoa, nose, and snina^ a mark. 



