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Show 68 MAMMALIA. d'ffi s again f1·om the others in having a slight projection of 1 er . the thumb, though but for a single phalanx, but Without a nail • its hair is totally black. A' second species the Mikiri, .B.t. hypoxanthus, Pr. Max.; B ·rachyteles macrotarsus, Spix, pl .. i., has als~ ~ very s~all thumb, and sometimes even a na1l. The h~1r 1s yellow1sh, ferruginous towards the tail. These two spec1es are separated by Spix under the name BRAOHYTELES. They connect the Ateles with Lagothrix. The other ATELES to which alone Spix restricts that name- Goa-ita, BufY.-have no apparent thumb whatever. Such are the following: A. paniscus; Simia panisc. L.; Coaita, Buff. XV, 1. (The Coaita.) Completely covered with black hair, like the Chamek, but without any visible thumb; face, flesh-colour . .11. ater, Fr. Cuv. Mammif. (The Cayou.) Face black, like the rest of the body. .fl. marginatus, Geoff. The Chuva, Humb. or the Coaita a face bordee, Ann. Mus. XII, pl. 10. Black, with a border of white hairs round the face. .fl. belzebuth; Sim. beelzeb., Briss. The Marimonda, Humb. or Coaita a ventre blanc, Geoff.; Ann. Mus. VII, pl. 16. Black above; white beneath; circumference of the eyes flesh-co· loured . .fl. arachnoides, Geoff. Ann. Mus. XIII, pl. 9. (The Spider Monkey.) Fawn-coloured or red; eyebrows black. All these animals are natives of Guiana or Brazil; their fore-feet are very long and slender, and their gait remarkably slow.(1) LAGOTHRix, Geoff.-GASTRIMARGus, Spix. Head round, like the Ateles; a thumb like the Alouattes; tail partly naked, like the one and the other. Such are the L. Humbol· dii, Geoff.; the Caparo, Hum b.; Gast. olivaceus, Spix, pl. 28 (The Capparo); and the Grison; Lag. canus., Geoff.; Gastr. infumatua, Spix, 29. (The Silver-haired Monkey.) Monkeys fram the interior of South America, said to be remarkable gluttons. The other Sapajous (CEBus, Geoff.) have a round head, distinct thumbs, and the tail hairy, though prehensile. The species are more numerous than those of the Alouatte, and are characterised with nearly as much difficulty. (1) They exhibit some remarkable resemblances to man in their muscles. Of all animals, they alone have the biceps of the thigh made like his. QUADRUMANA. 69 Some of them have the hairs on the forehead of a uniform length, such as the Sim. appella, L. (The Sajou); and the S. capucina, L.; Buff. XV, 4, 5 and a, 9. (The Capuchin.) Both of them of different browns; in the first, the circumference of the face is blackish; in the second it is whitish; but the shade of colour in all the rest of their bodies varies between a brownish black and a fawn-colour, sometimes even a white. The shoulders and breast are however generally lighter, and the calotte and hands darker.( 1) Others, again, have the hairs of the forehead so disposed as to form a kind of aigrette, such as the Sim. fatuellus, Gm.; Buff. Supp. VII, 29. (The Horned Sajou.) This animal has a tuft of black hairs on each side of the forehead.(2) The disposition of these Monkeys is mild and gentle, their motions quick and light, and they are easily tamed. Their name of Weeping Monkeys is derived from their soft plaintive voice. In the SAIMIRI the tail is depressed, and almost ceases to be prehensile; the head is very much flattened; in the interorbitar partition of the skeleton there is a membranous space. There is only one known; the Simia sciurea, Buff. XV, 10. (The Siamiri.) Size of a Squir- (1) The Sajous and the Sais vary so much from a brown to a yellow, that were there not intermediate varieties, we should be tempted to make many speciea of them. Such is the case with the Sim. trepida, syrichta, lugubris, jlavia, L. and Schreb., as well as some of those distinguished by M. Geoffroy, Ann. du Mus. XIX, 111 and 112. Spix has recently, and in our opinion improperly, multiplied them still more. We would refer to the Sajou (Sim. apella, Lin.) the Cebus robustus, Pr. Max., which appears to us an old one of that species. The Ceb. matrocephalus, Spix, pl. 1, does not seem to differ from it, so far as regards the species. We refer to the Sai (8. capucina, Lin.) the Sai a gorge blanclte, Buff. (8. hypolencos),· the Cebus libidi'11.08u8, Spix, 2; the Ceb. xanthosternus, Pr. Max., or the Ceb. xanthocephalus, Spix, 3; the Ceb. cucullatus, id. 6. We should be more inclined to consider as distinct species, the Sajou a pieds ®tis, Fred. Cuv., the Sajou brun, id. or Ceb. unicolor, Spix, pl. 4; the Sim. jla?Jia, Schreber, 31, B, from which the Ceb. gracilis, Spix, pl. 5, seems to differ only in the stuffing-but that we require numerous observations, made on the spot which these animals inhabit, before we can hope to establish their species in any other than an arbitrary manner. (2) Here should come the Cebuscirrhifer, Geoff. and the Ceb. of the same name, ofPr. Max., but which is different. Ceb. cristatus, Fred. Cuv. |