124 MYOXICEBUS 



GENUS MYOXICEBUS. GENTLE LEMURS. 



MIOXICEBUS ( !) Less., Spec. Mamm, 1840, p. 207. Type Lemur 

 griseus Geoffroy. 



Hapalemur (!) I. Geoff., L'Instit., 19 Ann. No. 929, p. 341, foot- 

 note, 1851 ; Id. Cat. Primates, 1851, p. 74. 



Prolemur. Gray, Proc. Zool. Soc. Lond., 1870, p. 828, pi. LII, 

 figs. 1-4. 



Head globose; muzzle short, tapering; ears short, hairy; hind 

 limbs longer than fore limbs, feet short, broad; tail hairy, as long as 

 body. Skull: facial portion short, narrow; nasal bones arched; pre- 

 molar small ; paroccipital processes small, distinct, laterally compressed, 

 pointed ; braincase rounded, without crests ; palate reaching to middle 

 of last molar; mastoid region not inflated; mandible with large angle 

 produced downward, inward and backward. Upper incisors very small, 

 subequal ; canines small, with a narrow diastema between them and 

 first premolar ; this last tooth has but one cusp ; the last premolar has 

 one inner and two outer cusps united by a ridge ; cingulum prominent 

 externally, internally rudimentary ; last upper molar tricuspidate. All 

 these teeth are serrated. The molars have one inner and two outer 

 cusps not connected by a ridge, with a cingulum having an external cusp. 

 The first and second lower premolars are oblique, the second having 

 one outer and one inner cusp ; posterior premolar has three outer and 

 two inner cusps, with transverse ridges between the inner and outer 

 cusps. All these teeth except the molars are serrated like those in the 

 upper jaw. Wrist without os centrale. 



LITERATURE OF THE SPECIES. 



1796. E. Geoffroy St. Hilaire, in Magasin Encyclopedique. 



Myoxicebus griseus first described as Lemur griseus; and the 



same species redescribed as Lemur cinereus. 

 1840. R. P. Lesson, Species des Mammiferes Bimanes et Quadru- 



manes. 



The genus Myoxicebus was instituted here, and two species 



placed in it, which were, however, not co-generic. Lemur 



