Journal of the Federated Malay States museums - Sabrizain.org

1917.] H.C.Robinson: Races of Malayan Mammals. 103
TOMEUTES rENUIS TIOMANICUS, Sltbsp. nov.
I ype :— Adult male (skin and skull) No. 728 15, Federated
Malay States Museums collected at Juara Bay, East side of
Fulau Tioman, Pahang, on June 23rd. 1915, by H. C. Robinson.
Original No. 6580.
Characters:—A dull form of T. tennis, more allied to the
northern race I. tenuis snrdus (Miller) than to the bnghter
typical form from the southern two thirds of the Peninsula
and Singapore Id.. [T. tenuis tenuis (Horsf.)). Differing from
T. tenuis sordidus (Kloss) from Great Redang Island, in the
greater amount of black on the tail and from T. t. snrdus in
the more olivaceous, less ochraceous ground colour of the
upper surface and in the reduction of the white tips to the
hairs of the tail.
Colour:—Above an uniform grizzle of black and dull
olivaceous buff, shoulders, thighs, ears more ochraceous, feet
and hinds grizzled blackish and ochreous buff not nearly so
bright as in T. tenuis tenuis from Singapore. Tail above
white, bases of the hairs ochraceous buff, less bright than in the
mainland races but much brighter than in the form from
Great Redang Id., median area clear black, with a narrowwhite
tip. Pencil almost uniform black. Base of tail beneath
and scrotal region buffy. Beneath whitish with a strong
cream tint, the bases of the hairs except on the chin, throat and
median line broadly grey. Orbital ring, -ides of the face and
muzzle buffy ochraceous, the two latter more or less grizzled
with black. A clear buffy patch at the base of the vibrissae.
Skull and Teeth :— The skull and teeth show practically no
differences from the two mainland representatives and are not
reduced in size. The bullae are perhaps a little less globose
and slightly smaller and the constrictions which are very
noticeable in the mainland specimens are much less pronounced.
The zygomatic arches are a little heavier.
From the Great Redang, T. t. sordidus, the Tioman
animal differs in larger size and heavier and deeper rostrum.
The regularity of the maxillary nasal suture which is given by
Kloss as the only distinguishing cranial feature of bis form
does not appear to be reliable as it is not constantly present in
all the Redang specimens while it occurs in at least 15 per
cent, of specimens from othei sources.
Measurements:—Collector's external measurements of type :
head and body, 125 (136) ;* tail, 107 (109) ; hindfoot, 31 (30.5) '.
ear, 13 (13) mm.
Cranial measurements: greatest length. 37.1 (35.2);
condylobasilar length. 30.8 interorbital br idth, 12.2
1 1 2.()i : palatilar length, 15.9; diastema, 8.2; cranial I
1 n.i : zygomatic breadth, 22.1 121.71 maxillary tooth row, 6.9
median length of nasals. 11.1 nun.
Measurements in parentheses an I
No 1 j ^/i 3 collected on Kao Nawn
14th 191
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