474 Notices of various Mammalia. [No. 150. 



not, as I suspect, to the Papio of Prof. Owen,* which I have reason to 

 believe applies to the long-tailed African Baboons, or the Cynocephali, 

 Auctorum, exclusive of C. mormon and leucophceus, on the Mandrill 

 and Drill : whereas the long-tailed Macaci, such as the next species, 

 together with M. radiatus and M. sinicus of S. India, are referred by 

 Mr. Ogilby to Cercopithecus. But the truth is, that if we once com- 

 mence dividing the group Macacus, as now generally recognised, near- 

 ly every species of it might be selected as a subgeneric type per se, 

 presenting various peculiarities of its own (e. g. M. niger, nemestrinus, 

 sitenus, rhesus, cynomolgus, radiatus with sinicus, and perhaps others 

 with which I am less familiar) : and I certainly much prefer the cur- 

 rently adopted system of restricting Cercopithecus to the numerous 

 African species which want the fifth tubercle to the last inferior molar, 

 and follow Mr. Martin in appropriating the name Cercocebus to those 

 other long-tailed African species which are known as the Mangabeys, 

 or white-eyelid monkeys, of which three have now been ascertained, — 

 an arrangement which has the advantage of according with the geo- 

 graphical distribution of these animals, and by which, too, any of them 

 may be classified at a glance at their exterior, by those who are 

 familiar with the subject.t 



M. cynomolgus (?J Though possessing living examples of both the 

 31. nemestrinus and M. cynomolgus, I have found great difficulty in 

 determining the skins sent by Capt. Phayre, which I refer to these 

 species, in consequence of the mode of preparation of them, the skulls 

 having been taken out, and the faces irreparably injured; but after 

 full consideration, I feel confident that the present one is correctly 

 assigned, if not the other also. A pair of skulls of this are sent, from 

 which the following dimensions are taken. That of an adult male mea- 

 sures four inches and three-quarters in total length, inclusive of the pro- 

 truding incisor-teeth ; greatest breadth (of zygomce) three inches ; ver- 

 tical height (including lower jaw) three inches and one-eighth; length 

 of bony palate an inch and seven-eighths; breadth of ditto three 

 quarters of an inch. The corresponding measurements of a female 



* Mentioned in the Report on British Fossil Mammalia, published in the " Report 

 of the British Association" for 1842, p. 55. 



f If I mistake not, the tail is in Cercopithecus and Cercocebus of constant propor- 

 tional length, being much longer than in any Macacus. 



