. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Skull of Stenops potto. ( Original, Mus. Leyden.) between the two orbits is much larger than in Stenops javanicus, tardigradus and gracilis. It is the narrowest in Stenops gracilis, broader in Stenops javanicus, still broader in S. tardi- gradus, and the broadest in S. polio. In S. potto the circular boundary for the orbits is not so distinct as in other species. Fourth Genus. Lichanotus ILLIGER. Indri. The same form of teeth, but they have only two incisors in the lower jaw. This genus has but one species (L. Indri), di
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Skull of Stenops potto. ( Original, Mus. Leyden.) between the two orbits is much larger than in Stenops javanicus, tardigradus and gracilis. It is the narrowest in Stenops gracilis, broader in Stenops javanicus, still broader in S. tardi- gradus, and the broadest in S. polio. In S. potto the circular boundary for the orbits is not so distinct as in other species. Fourth Genus. Lichanotus ILLIGER. Indri. The same form of teeth, but they have only two incisors in the lower jaw. This genus has but one species (L. Indri), distinguished by the want of the tail. Madagascar. The dental formula is : Incisors, - ; canines, - ; molars, — =30. & £ 1U Fifth Genus. Semnocebus LESSON. Avaln. The Semnocebus approaches very much to Lichanotus, from which it differs by the exist- ence of a tail, and by the form of its skull. In a skull of the ^wz/«, Mus. Leyden (Jig. 136), Fig. I observe a depression on the frontal surface, between the two orbits, which part is, on the contrary, convex in Lichanotus. The muzzle is not so much protruded as in Lichanotus, and more flat on its anterior part, formed by the intermaxillary bones. The teetli are the same in both. Madagascar. Spec. — Semnocebus laniger or Avahi. Sixth Genus. Chcirogalcus. Among the unpublished drawings of Coin- merson, Geoffrey St. Hilaire discovered re- presentations of certain Lemur-like animals, which he considers as constituting a distinct genus. The characters were at first very in- distinct ; but we are now acquainted with the external aspect, the skull, and the teeth of this genus. The dental formula is : incisors, — ; canines, --- ; molars, - — =36. The 6 1 — 1 5 — 5 superior incisors are situated in two pairs, with a great interval between both. On each side of the upper jaw there is a large canine, with six molars, of which the two first have acuminated crowns, and seem to be spurious molars; the four posterior are t
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