MAMMALIA. 751 



Compare GEOFFR. SAINT-HILAIRE Mem. sur les singes a main impar- 

 faite, Ann. du Mus. vii. pp. 260 273. (The last species noticed there, 

 Ateles polycomos, is from the Eastern hemisphere, and belongs to Colobus 

 ILLIG.) 



Sub-genus Eriodes ISID. GEOFFB. (With fur woolly.) 



Sp. Ateles hypoxanthus PK. MAXIM., Abb. zur Naturgesch. Bras. Lief. I. 

 GUEB. Iconogr., Mammif. PI. 4, fig. I (Brachyteles I SPIX), with a very 

 short thumb on the anterior limbs, without nail. (Eriodes hemidactylus 

 ISID. GEOFFR., Mem. du Mus. xvii. PI. 22, differs by having a nail on this 

 thumb, but is, according to WAGNER, of the same species.) The fore feet 

 have, on the contrary, only four fingers in Aides arachnoides GEOFFB., 

 Ann. du Mus. xin. PI. 9, although in the skeleton one phalanx is attached 

 to the metacarpal bone of the thumb (WAGNER Supplementband, 5te Abth. 

 s. 81). 



Sub- genus Ateles (in stricter sense, with long, rigid hair). 



Sp. Ateles paniscus, Simla Paniscus L., BUFF. xv. PI. i, AUDEB. Singes, v. i, 

 PI. 2 ; VOSMAER Beschrijving van eene Amerikaansche langstaartige aapsoort, 

 Amsterdam, 1768, 4 to; the coaita, dark black, the face red; fore feet 

 without thumb; the skeleton is figured in PANDER und D'ALTON Die 

 STcelete der Vierhander, Tab. II. ; Surinam, Brasil. In a very similar spe- 

 cies a short thumb occurs: Ateles pentadactylus GEOFFR., Ateles belzebut 

 GEOFFR., Cercopithecus belzebut BRISS., GEOFFR. Ann. du Mu*. vn. 

 PL 16, &c. 



Lagothrix GEOFFR., Gastrimargus SPIX. Head rounded, 

 beardless. Feet very long, fore feet pentadactylous. Fur soft. 

 Tail with tip naked below. 



Sp. Lagothrix cana GEOFFR., Gastrimargus olivaceus SPIX, SCHREB. Sdugth. 

 Tab. 26 F ; Lagothrix infumata, Gastrimargus infumatus SPIX, Cuv. H. 

 Ani., ed. ill., Mammif. PL 16, fig. 4. (This genus differs little from the 

 preceding.) 



Mycetes ILLIG., Stentor GEOFFR. Head pyramidal, bearded. 

 Fore feet pentadactylous. Tail naked below at the apical part. 

 (Lower jaw very high ; hyoid bone expanded into an ample, reso- 

 nant bulla.) 



Sp. Mycetes seniculus, Simia Seniculus L., BUFF. vn. PL 25, AUDEB. Singes, 

 v. i, PL 7, GUEB. Iconogr., Mammif. PL 3, fig. 3; the howling monkey, 

 VAlouatte, le hurleur roux, der BruUaffe; South America, Surinam, Brasil. 

 (WAGNER is of opinion that Mycetes ursinus HUMB. Recueil, I. PL 30, and 

 Stentor chrysurus GEOFFR. may be referred to this same species.) Mycetes 

 Beelzebut, Mycetes rufonanus KUHL, &c. Compare on this genus ISID. 

 GEOFFR., GUEBIN Magas. de Zool. 1831; GRAY Ann. of nat. Hist. xvi. 

 pp. 217 221. 



