FASCICULI MALAY FUSES 
39 
One of the Jalor specimens, while apparently fairly adult, is considerably 
smaller and darker than the other two. At first sight, small dark coloured 
examples of this species resemble R. pruinosus^ but they may always be dis- 
tinguished by the red on the face and the longer tail. 
They are possibly referable to R. erythrogenys^ Anders., which, on the 
material at my disposal, I can only consider as a colour phase of the true 
R, sumatrensis^ depending on the individual rather than the locality whence it 
comes. 
‘ We never met with the bamboo rat ourselves, all our specimens having 
been brought in by natives. With the larger of the Jalor specimens were four 
young ones, almost exactly resembling their parent in coloration.’ 
55. Hystrix g^rotei (Gray) 
(Plate III) 
Acanthochoerus grotei, Gray^ P.Z.S. 1866, p. 310 ; Sclater^ loc. cit.^ p. 417. 
Hystrix longicauda (Marsden), Sclater^ P.Z.S. 1871, p. 234 ; Flower., P.Z.S. 
1900, p. 364. 
Hystrix yunnanensis (Anders.), Bonhote., P.Z.S. 1900, p. 881. 
a-c. $ 9 Mabek, Jalor. 27 th July, 1900. 
d. (J- imm. (skull only). 27th July, 1900. 
The type of H. grotei., which is unfortunately a young specimen, and with 
which I have compared the above, leaves no doubt that these can be referred 
to that species. The only question about which doubt can exist is as to the 
advisability of using Gray’s name instead of the H. longicauda from Sumatra 
of Marsden* ; Marsden gives a plate but no description, and without specimens 
from Sumatra it is impossible to say whether the Sumatran animal is identical 
with that of the mainland or not. 
Gray’s description of his type agrees well with the adult specimens, but 
in the skin the nuchal crest is not visible, as the spines forming it are hardly, 
if at all, longer than those on the surrounding parts, but a few of them have 
a conspicuous white tip. The narrow lunate half collar under the throat is 
also well marked in all the specimens. 
The skull, which is large, approaches most nearly to that of H. muelleri, 
Jent, from Borneo, but is larger and has a much stouter muzzle. The nasals 
are long and of fairly uniform width throughout their length, their posterior 
margin being about level with the hinder edge of the first molar, and being 
longer than the greatest length of the frontals by about half-an-inch. The 
praemaxilla is of moderate breadth at its posterior end, which lies about level 
with the anterior margin of the premolar. 
F 
Marsden, Nat. Hist., Sumatra (3rd ed.), p. 118, pi. xiii (1818) 
1/7/03 
