640 MR, ST. GEORGE MIVART ON THE CRANIA__[Nov. 22, 
equal, but the posterior one on each side quite internal to the canine, 
which is small. First premolar above longer than the second, but 
the dental series on each side very nearly equal ; third premolar above 
shaped like the upper molars, which it exceeds in size. The molars 
and third premolars above with a well-marked external cingulum, 
but with the internal cingulum quite rudimentary. A paroccipital 
process. A large malar foramen; carotid foramen not obvious in 
the basis cranii; angle of mandible exceedingly large, and produced 
downwards and inwards, as well as backwards. 
The type specimen is in the Museum at Paris. 
Genus 3. Microcesus, Geoff. St.-Hil. (1828). 
Microcebus, Geoff. St.-Hil. Cours sur les Mamm. (1828) lec. vi. 
p- 26; Wagner, Schreber, Supp. i. (1840) p. 277, v. (1855) p. 153 ; 
Dahlb. Studia Zool. p. 231; Isid. Geoff. St.-Hil. Cat. des Primates, 
p-. 79; Peters, Reise nach Mossamb. p. 13. 
Chirogaleus, Wagner, Schreb. Supp. v. p. 147; Dahlb. Studia 
Zool. p. 223. 
Cheirogaleus, Isid. G. St.-Hil. Cat. des Prim. p. 77. 
Lepilemur, Gray, P. Z. 8. (1863) p. 143. 
Myscebus, Lesson, Species (1840), p. 214. 
Gliscebus, Lesson, Species (1840), p. 216. 
Myocebus, Schinz, Syst. Verz. i. p. 105 (1844). 
Otolicnus, Van der Hoeven, Tijds. (1844) p. 43. 
Galago, Gray, Ann. & Mag. Nat. Hist. (1842); Geoff. Ann. du 
Mus. xix. (1812) p. 166; Desm. Mamm. p. 103; Kuhl, Beitr. p. 47; 
A. Smith, 8. Afr. Journ. (1835) ii. p. 31. 
Characters.—Tarsus elongated, but astragalus normal ; calcaneum 
about one-third the length of the tibia; upper incisors unequal, the 
anterior pair much the larger; third upper premolar very much 
smaller than the first molar, and with only one large external cusp ; 
upper molars with an oblique ridge from the postero-external to the 
large internal cusp, the postero-internal cusp being rudimentary or 
absent. Palate more or less prolonged beyond last molars ; posterior 
palatine foramina very large ; preemaxillz largely developed, joining 
the nasals for more than a quarter of their (the nasals’) length ; an 
interparietal bone ; malar foramen minute or absent ; angle of man- 
dible not produced downwards; seven lumbar vertebre. 
1. MicrocEsus MYOXINUS. 
M. myoxinus, Peters, Mittheilung zu der Gesells. Natur. Freunde, 
Berlin (1850) ; Reise nach Mossamb. p. 14; Wagner, Schreber, 
Supp. v. (1855) p. 154. 
Lepilemur myoxinus, Gray, P. Z. 8, (1863) p. 144. 
The type of the species is in Berlin. 
2. MicrocEeBUS MINOR. 
Galago minor, Gray, Ann. & Mag. N. H. (1842) x. p. 257. 
