219 
its narrowest part reduced to a mere point in an antero-posterior 
direction ; whereas in all the other species examined, with the excep- 
of H. latimanus, the greater part of the space which lies between 
the orbits is of equal breadth. In H. elegans this is remarkably the 
case. 
The lower jaws of this species and its fellow, H. latimanus, exhibit 
a difference also from most other species in the comparative short-— 
ness of the posterior angle or descending ramus, so that the hinder 
margin of the jaw, from the condyle to the angle, forms but a very 
slight curve. In most species, and especially in H. elegans, this 
part of the jaw is deeply emarginate. 
in. lin. 
Length from the extremity of the nasal bone to 
the prominence above the foramen magnum... | 1 
Breadth across the zygomatic arch...... Bd | sali 
— between the orbits..........0.----0- OQ 23 
Length of the nasal bones .........-.-+++--- 0 4 
of the molar range (upper jaw) ........ 0 2 
from anterior edge of front molar to the 
point of the incisor .......--.-6 eee eee eee 0 33 
— of the lower jaw, from the point of the 
incisor to the condyle ........--++--+-++05- 0 8 
— of molar range (lower law)............ er 
Height from the angular process to the summit of 
the coronoid process ........-+-+--+eeeee O SG 
H. AUREUS, 0. S. 
The colour of this species is sufficient to distinguish it from all 
others. It is of a golden-brown colour on all the upper parts, and 
similar beneath, but paler and much duller. 
The muffle has two very distinct points beneath the nostrils ; the 
ears are of medium size, as broad as long, and somewhat hairy on 
both their surfaces ; the whiskers are numerous, long and black. The 
arms are well clothed with fur like that of the body, quite to the 
wrists, and the feet have all their upper surface well covered by short 
and shining hairs of a brownish yellow colour. The hinder feet are 
similarly clothed with shining hairs, those which are above and 
around the claws long and yellow; on the calcaneum is a distinct 
tuft of curved bristly hairs. The tail is finely annulated, and suf- 
fused with exceeedingly short hairs, which do not conceal the scales, 
and is of a uniform darkish brown colour. 
The fur is long and thick, but not very fine. Everywhere it is 
dark dusky at the root, with its terminal fourth bright yellow brown. 
On all the under parts similar, but paler and less bright ; and along 
the dorsal line there is a sufficient mixture of longish black hairs to 
conceal the bright colour of the fur. On the hind part of the back, 
the rump, and back of the thighs, it is bright enough to be properly 
styled a golden brown, somewhat like the colouring of the most vivid 
examples of the Agouti (Dasyprocta). 
