1864. ] AND DENTITION OF THE LEMURID. 639 
limbs considerably longer than the fore limbs ; tail at least equalling 
two-thirds the length of the body ; mastoidal region of the periotic 
not inflated ; dorsal and lumbar vertebra together never exceeding 
twenty; gall-bladder with its base turned towards the back *. 
Hab. Madagascar. 
Genus 1, Lemur, Geoff. St.-Hil. (1796). 
Lemur, Linn. Syst. Nat. ed. 10. p. 30; Geoff. St.-Hilaire, Mém. 
sur les Makis (1796); Illiger, Prod. p. 73 (1811) ; Fischer, Syn. 
p- 73; Anat. der Maki, p.17; Desm. Mam. p. 97; Van der Hoeven, 
Tijds. p. 32; Wagner, Schreber, Supp. i. p. 262, v. p. 141; Gray, 
P. Z. 8. (1863) p. 136; I. G. St.-Hilaire, Cat. des Prim. p. 70; 
Dahlb. Studia Zool. p. 211. 
Prosimia, Briss. Rég. Anim. p. 220 (1756); Less. Species des 
Mamm. p. 220; Smith, 8. Afr. Journ. ii. p. 28 (1835); Gray, P.Z.S. 
(1863) p. 137. 
Varecia, Gray, P. Z. 8. (1863) p. 135. 
Characters.— Muzzle elongated; tarsus short ; upper incisors sub- 
equal, both pairs anterior to the canines; upper molars with very 
large internal cingulum; first upper premolar shorter than the 
second ; all upper premolars with only one large external cusp ; first 
upper molar considerably exceeding the third premolar in size ; upper 
canines very large ; sphenoidal fissure and foramen rotundum nor- 
mally distinct; generally a large malar foramen; carotid foramen 
not obvious on the basis cranii; angle of mandible not produced 
downwards. 
Genus 2. Hapatemur, I. Geoff. St.-Hil. (1851). 
Hapalemur, I.Geoff. St.-Hil. Cat. des Prim. p. 74; Gray, P. Z.S. 
(1863) p. 141. 
Hapalolemur, Giebel (1859), Saug. p. 1018; Sclater, P. Z. 8. 
(1863) p. 161. 
Lemur (subgenus Hapalemur), Dahlb. Studia Zool. p. 220. 
Lemur (griseus), Fischer, Anat. der Maki, p. 24 (1804). 
Lemur (cinereus), Fischer, Syn. p. 77 (1829); Geoff. Mag. Encycl. 
i. p. 20; Desm. Mamm. p. 101. 
Chirogaleus, Van der Hoeven, Tijds. pp. 30-38, t. 1. f. 1; Wagner, 
Schreb. Supp. i. p. 276, v. p. 148. 
Semnocebus (jeune Age), Less. Species des Mam. p. 212. 
Maki gris, Buff. Supp. vii. t. 34. 
Characters.—Muzzle short ; tarsus short; upper incisors sub- 
* This distinction is given by Dr. Peters (Reise nach Mossambique, p. 14, and 
Proe. Zool. Soc. 1863, p. 382), but he does not refer to Hapalemur ; its condition 
in that genus is unrecorded, and, I believe, unknown. Other characters, above 
enumerated, such as the structure of the tarsus, the number of dorsal and lumbar 
vertebrz, are, as well as the position of the gall-bladder, unknown to me in certain 
species, as Microcebus furcifer, M. smithit, M. typicus, Cheirogaleus milii, and 
Lepilemur murinus, as also the condition of the mastoidal region of the periotic 
in the last. 
