972 MR. ST. GEORGE MIVART ON THE LEMURIDjE. [DcC. 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. One native name " Walouwy." 



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

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



MlCROCEBUSf. 

 ^' 4 ' ^' 1-1' ^•^^^- 3-3' ^*^- 3-3' 18 •'"• 



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 the 

 large internal cusp, the postero-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 vertebree ; tarsus always with the 

 naviculare more elongated than the cuboides. 



Hab. Madagascar, 



1. M. piisillusX- 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. 6. 



t Geoff. St.-Hil. Cours sur les Maram. 1828, 169. vi. p. 26 ; Isid. Geoff. St.-Hil. 

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



+ Lemur pusillus, Geoff. St.-Hil. Mag. Encyc. 1796, i. p. 48. Mierocebus rufiis, 

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

 des Prim. p. 80. Gcdago madagascariensis, Gray, P. Z. S. 1863, p. 149. M. 

 pusilhis, Waterhouse, Cat. of Miis. of Zool. Soc. 2nd edit. p. 12. no. 89 ; and St. 

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



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

 1863, p. 143. 



II Peters, Reise nach Mossarabique, p. 14, and St. Geo. Mivart, 1864, p. 64U. 

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



