3. ARCTOriTIIECUS. 365 



the back. The angle of the lower jaw much produced, narrow, siih- 

 acute.— Gray, Z. c. t. 11, f. 3, 4. 



Arctopithecus marnioratiis, Gmi/, P. Z. S. 1849, p. 71, t 11 f 3 4- 

 Turner, F.Z.S.l8rA, -p. 208. ^ ■ i. o, * , 



Bradypus infuscatus (female), War/kr, Isis, 1831, p. G03: Waoner, 

 ^ Hchreh. iSdur/eth. Supp. ; Rapp, Edent. p. 6. 



Hah. Brazil ; Para {Hoffinannsecj(i). 



3. Arctopithecus Blainvillii. !» > 



Grey-brown, back and outside of tlie arm white-varied, with an ^ ■ 'p-f^ 



elongated narro\\^ streak extending nearly the whole length of the ^^^^^Ma^.V^J 



back. Forehead very convex and swollen over the orbits. Teeth 3*^4 /?!/ ' 



rather large ; front lower compressed. i /'. 



Arctopithecus Blainvillii, Gray, P. Z. S. 1849, p. 71, t 11 f •' • Tur- ' P / 



ner, P. Z. S. 1851, p. 209. ' ' ' ^A<?vt^ ^i^ 



Bradj^jus tridactylus brasiliensis, i5/rtmy. O.'j^eV//-. Brad. t. 2, 3 , f^i I „i' 



Bradypus tridactylus, var., Peto-s. ^iTl'V: jf> . I QQ 



Hah. Tropical America ; Brazil. 



b. Fur elom/ate, very flaccid, tvhitish ; dorsal streak very short, indistinct, 

 only seen where the hair is worn. 



4. Arctopithecus flaccidus. B.M. 

 Pale grey-brown ; back, sides of the back, and hinder part white- 



Yaii«d, with a short blackish dorsal streak between the shoulders. 

 Skull with a broad rather convex forehead. 



Arctopithecus flaccidus, Gray, P. Z. S. 1849, p. 72 : Turner P. Z S 

 1851, p. 209. ) • • • 



Bradypus tridactylus, Tcmm. ; Eapp, Edent. p. 5. 

 Ai seconds et Ai jeuue, Bujfun, II. N. xiii. p. 02, t. 5. 

 Yar. 1. Dy.sonti. Whitish grey-brown ; hair of the back blackish, 

 back with a short black streak and a white spot on each side be- 

 tween the shoulders. Hah. Venezuela (Dyson). — B.M. 



Var. 2. Smithii. Nearly uniform whitish grey-brown ; base of 

 the hair blackish, without any dorsal streak. Hah. Para (J" F G 

 Smith). — B.M. V • • • 



Hah. South America. 



5. Arctopithecus problematicus. B.M. 



Fur unknown. Skull rather elongate ; forehead broad, rather con- 

 vex on each side over the middle of the orbit. Lower jaw with a 

 rather broad produced angle. 



Arctopithecus problematicus, Gray, P. Z. S. 1849, p. 73 t. 11. f. 5. 

 Hah. Para {J. P. G. SmitJi). 

 This may be the skidl of A. Jlaccidu.t Smithii. 



BnADYroniDA ouAviGRADA, OM'en, Burm. 

 See fossil genera :— 1. .Me:/ath<riam, (.'uvier ; 2. MyJodon, Owen ; 



3>-io.cl^^ j^MA^ Xfc^i^y^M., Yd. 12:. ,^-/k^ 



