ABCTOriTHECUS. 



365 



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

 acute. — Gray, I. c. t. 11. f. 3, 4. 



Arctopithecus marmoratus, Gray, P. Z. S. 1849, p. 71, t. 11. f. 3, 4 ; 



Turner, P. Z. S. 1851, p. 208. 

 Bradypua infuscatus (female), Wagler, Isis, 1831, p. 603 ; Wagner, 

 Sehreb. Saugeth. Swpp. ; Rapp, Edent. p. 6. 

 Hah. Brazil ; Para (Hoffmannsegg). 



3. Arctopithecus Blaiuvillil. 



Grey-brown, back and outside of the arm white-varied, with an 

 elongated narrow streak extending nearly the whole length of the 

 back. Forehead very convex and swoUen over the orbits. Teeth 

 rather large ; front lower compressed. 



Arctopithecus Blainvillii, Gray, P. Z. S. 1849, p. 71, 1. 11. f. 2 ; Tur- 

 ner, P. Z. S. 1851, p. 209. 

 Bradypus tridactylus brasiliensis, Blainv. Osteogr. Brad. t. 2, 3. 

 Bradypus tridactylus, var., Peters. 



Hah. Tropical America ; Brazil. 



b. Fu/r elongate, very flacdd, whitish ; 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- 

 varied, 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 ; Twmer, P. Z. S. 



1851, p. 209. 

 Bradypus tridactylus, Temm. ; Bapp, Edent. p. 6. 

 Ai seconds et Ai jeune, Buffon, H. N. xiii. p. 62, t. 6. 



Yar. 1. Dysonii. Whitish grey-brovm ; 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. Hab. Para (J. P. G. 

 Smith).— B.M.. 



Hah. South America, 



5. Arctopithecus problematicus. B.M. 



Pur 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, 1. 11. f. 6. 



Hah. Par^ (J. P. G. Smith). 



This may be the skull of A. flaccidus Smithii. 



Brabtpodida geavigeada, Owen, Burm. 

 See fossil genera : — 1. Mec/atherium, Cuvier ; 2. Mylodon, Owen ; 



