972 MR. ST. GEORGE MIVART ON THE LEMURID^. [DeC. 12, 



symphysis ; angle of mandible produced downwards ; muzzle elon- 

 gated ; dorsum of naviculare nearly equal in length to the astragalus; 

 astragalus only half the length of the os calcis ; cuboides consider- 

 ably shorter than the dorsum of the naviculare. 



From the west of Madagascar. Oue native name " Walouwy." 



3. C. coquereli*. From the forests of Congony, inside the bay 

 of Passandava. Called by some of the natives " Sietui." 



MlCROCEBUSf. 



I. ■^, C. lEl, P.M. -^ M. lEi. =^=36. 



Upper incisors unequal, the anterior pair the larger ; third upper 

 premolar very much smaller than the first molar, and with only one 

 external cusp ; first two upper premolars of subequal vertical extent ; 

 upper molars with an oblique ridge from the postero-external to tlie 

 large internal cusp, the j)ostero-internal cusp being rudimentary or 

 absent ; fifth cusp of last lower molar distinct ; palate more or less 

 prolonged beyond the last molars ; posterior palatine foramina very 

 large ; palate with defects of ossification ; prsemaxillse largely deve- 

 loped, joining the nasals for more than a quarter of their (the nasals') 

 length ; an interparietal bone ; no malar foramen ; carotid foramen 

 not very conspicuous, but more or less hidden by the eustachian 

 process of the auditory bulla; pterygoid fossae very short; ecto- 

 pterygoid plates diverging widely backwards ; angle of mandible not 

 bent downwards; seven lumbar vertebrae; tarsus always with the 

 naviculare more elongated than the cuboides. 



Hab. Madagascar. 



1. M. pusillusX. First pair of upper incisors very slightly larger 

 than the second pair ; first upper premolar not quite so extended 

 vertically as the second ; defects of ossification in palate very small ; 

 snout much produced ; profile of anterior nares very concave. 

 Colour bright red-brown. 



From the east coast of Madagascar. 



2. M. smithii^ 1 First upper incisor much larger than the second. 

 Colour pale bay. 



3. M. myoxinus\\. First upper incisor much larger than the 

 second; first upper premolar quite as vertically extended as the 



* Pollen and Schlegel, loc. cit. p. 12, pi. R. 



t Geoff. St.-Hil. Courssurles Mamm. 1828, le?. vi. p. 26 ; Isid. Geoff. St.-Hil. 

 Cat. des Prim. p. 79, &c. 



\ Lemur jmsilhis, Geoff. St.-Hil. Mag. Encyc. 1796, i. p. 48. Microcehusrufus, 

 Geoff. St.-Hil. Cours de I'Hist. Nat. le^ou tI. p. 26 ; Isid. Geoff. St.-Hil. Cat. 

 des Prim. p. 80. Galago viadac/ascariensis. Gray, P. Z. S. 1863, p. 149. M. 

 ^usUIks, Watcrhouse, Cat. of Mu's. of Zool. Soc. 2nd edit. p. 12. no. 89 ; and St. 

 Geo. Mivart, P. Z. S. 1864, p. 641. 



§ Chcirogakus smiihii. Gray, Ann. & Mag. N. H. 1842, x.p. 257, and P. Z. S. 

 1863, p. 143. 



■ II Peters, Reise nach Mossambique, p. 14, and St. Geo. Mivart. 1864, p. 640. 

 Lepilemur myoxinus. Gray, P. Z. S. 1863, p. 144. 



