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Show 972 MR. ST. GEORGE MIVART ON THE LEMURIDAE. [Dec. 12, symphysis ; angle of mandible produced downwards ; muzzle elongated ; dorsum of naviculare nearly equal in length to the astragalus; astragalus only half the length of the os calcis; cuboides considerably 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- I. ^2, C. £, PM. 3, M. g, =||=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 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 developed, 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 fossee 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. pusillus%. 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, pl. 6. t Geoff. St.-Hil. Cours sur les M a m m . 1828, lee. vi. p. 26; Isid. Geoff. St.-Hil. Cat. des Prim. p. 79, &c. + Lemur pusillus, Geoff. St.-Hil. Mag. Encyc. 1796, i. p. 48. Microcebus rufus, Geoff. St.-Hil. Cours de l'Hist. Nat. lecon vi. p. 26; Isid. Geoff. St.-Hil. Cat. des Prim. p. 80. Galago madagascariensis, Gray, P. Z. S. 1863, p. 149. M. pusillus, Waterhouse, Cat. of Mus. of Zool. Soc. 2nd edit. p. 12. no. 89 ; and St Geo. Mivart, P. Z. S. 1864, p. 641. § Cheirogaleus smithii, Gray, Ann. & Mag. N. H. 1842, x.p. 257, and P. Z. S 1863, p. 143. l || Peters, Reise nach Mossambique, p. 14, and St. Geo. Mivart, 1864, p. 640. Lepilemur myoxinus, Gray, P. Z. S. 1863, p. 144. |