. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. QUADRUMANA. of it the genus Chrysothrix. Its tail is not prehensile, but depressed, and often twisted round objects. Its head is flat; between the two orbits there is but a membranous septum, instead of a bony wall, and the glans penis is round, as in man; while it is flat, in the form of the head of a mushroom, in the Cebi, which have the penis in continual erection. G. Sixth Genus. Nochthora F. CUVIER. Aotus HUMBOLDT. Douj'ocouK. Differs only from the genus Callilhrix by large nyctalope eyes and ears, which are partly
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. QUADRUMANA. of it the genus Chrysothrix. Its tail is not prehensile, but depressed, and often twisted round objects. Its head is flat; between the two orbits there is but a membranous septum, instead of a bony wall, and the glans penis is round, as in man; while it is flat, in the form of the head of a mushroom, in the Cebi, which have the penis in continual erection. G. Sixth Genus. Nochthora F. CUVIER. Aotus HUMBOLDT. Douj'ocouK. Differs only from the genus Callilhrix by large nyctalope eyes and ears, which are partly co- vered by the skin, and by a small face. The species of this genus have nocturnal habits, and a feline physiognomy. They feed not upon fruit, as the precedent species, but on small birds and insects. In their form, noc- turnal habits, and great sensibility to light, the Nochthorcc approach very much to the species of the genus Stcnops, from which they differ in their internal structure. Their nails are straight, long, and sulcated. The dental f , . . 4 .1—1 , formula is: incisors ..canines— —, molars 4 I — 1 (J Q They inhabit Brazil. 6—6 Spec. — Nochthora trivirgata. 7. Seventh Genus. Pithecia. Saki. The characters of this genus consist in the bushy, but short, prehensile, and long tail, the slender body, the large ears, the dense beard in some species, and the straight, but claw-like nails. Their incisor teeth are more prominent than in the genus Ccbus. Brazil. Spec. — Pithecia Satcmas, P. nifivcntris, P. leucocephala, P. inusla. 8. Eighth Genus. Hapale. Ouistili. Salmi. This genus departs more from the typical genera of monkeys of the New World than any other, inasmuch as they have only the same number of teeth as the monkeys of the Old 4 " i ] World,: incisors -, canines - —, molars T L I The nails, by being compressed and 5—5 5—5' pointed, assume the appearance of claws, ex- cept the thumbs of the after-hands, which have flat nails; but th
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