1907.] A REVISION' (JF MdXKEVS OF L'llE GEXUS CERCOriTIiECUS. 677 



either is to the Pinna [F. coiicolor), Lion {F. leo) or Tigei-(i'''. tiyris).* 

 This opinion, obviously suggested by the pattern of the skin, is 

 confiimed by the similarity in voice between the two species. 

 The I'oar, which is (j^uite unlike that of a Lion or Tiger, may be 

 descrilied as a series of hoarse barking coughs, an interval of about 

 one second separating each expirator}^ effort. It very much re- 

 sembles the sound produced by sawing a. piece of thin wood with 

 a coarse-toothed saw. In a female Jaguar now in the Gardens 

 the roar is less deep-toned, and its repetition is more rapid than 

 in a female ISTepalese Leopard, but whether these differences obtain 

 thi'oughout the species or are merely individual, I do not know. 

 In any case thei'e is no mistaking the fundamental resemblance 

 lietween the sounds. And I do not think there can be any doubt 

 that the existing Leopards and Jaguai's are descended from a 

 counnon stock which in compai-atively i-ecent times i-anged suffi- 

 ciently far to the noi-tli to pass from Asia to J^oi-th America or vice 

 versa. 



This explanation is in keeping with the greater resemblance, 

 above referred to, that obtains in pattern between Jaguai'S and 

 Noi-th Asiatic Leopards than between Jaguars and African 

 Leopards. And it may be noted that the Leopard which is the 

 least like the Jaguar in pattern is the one that is furthest 

 removed from it geographically, that is to say the form from 

 Grahamstown named Felis 'pardits melcmotlca by Dr. Giinthei". 



EXPLANATION OF PLATE XXXVIII. 



Pig. 1. Felis serval senegcdensis Less. Skin of a specimen from Sierra Leone, p. 667. 

 Fig. 2. Felis serval Schreb. Skin of large spotted form from Uganda, p. 667. 

 Fig. 3. Feiis servalina pantasticta, subsp. nov. Skin of specimen from Uganda, 



p. 66-5. 

 Fig. 4. Felis servalina liposticta, subsp. nov. Skin of type labelled " Mombasa," 



p. 666. 



8. A Monograpliic Revision o£ the Monkeys o£ the Genus 

 Cercopitliems. By R. I. Pocock, F.L.S., Superintendent 

 o£ the Gardens. 



[Received May 28, 1907.] 

 (Plates XXXlX.-XLlI.t, and Text-figures 179-193.) 



Introduction. 

 The name (Jercopithecus was fiist used in a binominal sense by 

 Erxleben in 1777 for all the long-tailed Monkeys of the Old World 

 known up to that time. Subsequent elimination of some of the 

 species contained in it to form the genera Colobas, Cercocehus, 

 Macacus, and others in the middle and early half of the last 

 century gradually gave to the genus its present significance, and 

 reduced the species referred to it by Erxleben to the following 

 nine : — cliana, mona, sabcea, patas, tiictitans, jietaurista., talapoin, 

 cephus, and rolotvay. 



* I refrain from putting the Ounce {F. uncia) in tbis category, having had very 

 few opportunities of studying this species either alive or dead, 

 f For explanation of the Plates, see pp. 745-746. 



