MAMMALIA SIMI.E. 17 



and nearly the whole of the tail black." Under part and inside of buttocks 

 white. In the colour it pi'escnts some resemblance with S. Icucopri/mmm, 

 particularly ill the white colour of the buttocks ; in S. nigrimanus, however, 

 they are only partially white. The nearest to it is S. mitratus, in which, 

 however, " the under side of the tail is white, the crest black, the buttocks 

 and thighs gray, and the hands grayish or white." From this exposition it ap- 

 pears clear that S. nigrimanus is nothing else than S. siamensis, instituted 

 by S. Miillcr and Schlcgel as far back as the year IS 41. With respect to 

 ft.fiiho-fjriseus, Desm., Is. Geoffrey observes that Desmoulins had taken the 

 description from S. leucoprymnus, and that of the skeleton from S. comatus, 

 and, moreover, that no specimen of S. allo-cinereus existed in the museum, and 

 that the species described in the voyage of the Bonite was S. obscurus. Nasalis 

 he distinguishes from Semnopitliecm, by the former having the septum of the 

 nostrils narrow, which is wide in the latter. With respect to S. comatus, 

 Blainville had already shown that the fifth tubercle of the hindmost lower 

 molar is wanting. 



The heads of Semnopitliecus mitratus, melalophos, and maurus, have been 

 figured in the ' Nederl. Verhandel Zool.,' (tab. xii, et seq.). 



In D'Orbigny's Diction. Univers. d'Hist. Nat., iv, 

 p. 116, the article Colobus has been contributed by Is. 

 Geoffroy. 



He still, interrogatively, assigns cheek pouches to this Ape, although 

 in my Monograph I have denied their existence in it, from observations made 

 on Colitbus Guereza, and which has now been confirmed by Owen also in 

 C. ursinus. Is. Geoffroy divides them in the following manner : (#) Hair very 

 long, black, or white and black. (1) C. vellerosus (s. bicolor, s. leucomeros). 

 (2) C. Cruereza. (3) C. polycomos. (4) C. ursinus. (5) C. satanas. 

 (fj) Hair of moderate length, colour varying from a bright red to olive. 

 (fyC.fuliffinosus. (7) C.ferrugineus, (S) C. Pennantii. (tyC.verus. With 

 reference to C. polycomos and ursinus, Is. Geoffroy is of opinion that " in the 

 present state of our knowledge it would be equally rash to assert the specific 

 distinction of these two baboons, or to withdraw one of the two species, as 

 nominal." I have shown, however, as long ago as in 1839 (Schreb. Suppl. 

 i, p. 307), from my own comparison of Pennant's original specimen of 

 C. polycomos, that C. ursinus is identical with it, which has been lately con- 

 firmed by Owen. The comparison also of Pennant's original specimen with 

 C. ferruyinosus has shown me that it is one and the same with C.fuliginosus 

 (Schreb., 1. e. p. 308). Of C. verus, Is. Geoffroy remarks that a robust figure 

 has been erroneously assigned to it. 



The genus Miopithecus, of which previously only a short 



2 



