196 
APPENDIX. 
This species is most nearly allied to S. tenuis, Horsf., which ranges from the Malay Peninsula to 
Borneo, and of which there are a large number of examples in the Natural History Museum. It differs, 
however, in its much paler orange-washed back, shorter and more prominently white-rimmed ears, the 
dark patches behind the latter, and in its less bushy tail. It is also worthy of note that although 
S. tenuis, throughout its range, is singularly uniform in coloration, yet, if anything, the Bornean 
specimens of it are darker in colour, and are therefore still less like S. jentinki than are those from the 
Malay Peninsula, a fact which shows that the two species have no tendency to grade into one another. 
I have named this species in honour of my friend Dr. P. A. Jentink, Director of the Leyden 
Museum, to whose labours we are indebted for much of our knowledge of the mammals inhabiting the 
East-Indian Archipelago. 
Mr. Whitehead informs me that S. jentinki ranges on Mount Kina Balu from about 3000 to 8000 
feet altitude. 
11. Sciurus notatus, Bodd. Elenc. Anim. p. 119 (1785). 
S. badjing, Kerr, Linn. An. K. p. 262 (1792). 
S. plantani, Ljung. K. Yet.-Ak. Handl. xxii. p. 99 (1801). 
a , b. Ad. % and imm. 3000 feet. 28/3/88. 
This common species, the Plantain Squirrel of Pennant, is represented by two specimens of the 
blue-bellied type, without any trace of red or yellow on their undersides. 
At the cost of another change of name, I am glad to be able now to supersede the barbarous term 
“ S. badjing,” which I was guilty of resuscitating on account of its priority over the commonly used 
“ S. plantani.” An examination of Boddaert’s rare work proves, however, that the Plantain Squirrel 
had already received a Latin name there, and one also that is fortunately both classical and appropriate. 
12. Sciurus whiteheadi, sp. n., Thos. Ann. Mag. N. H. (5) xx. p. 127 (1887). 
a. 3000 feet. 24/2/87. Type. 
b. 3000 feet. 28/2/87. 
c. S > hi spirit. 
Native name “ MantokA 
Size very small, only slightly larger than that of S. exilis, Mull. Ears narrow, pointed, their tips 
provided with beautiful black and white pencils of hair, so long as to reach, when laid backwards, almost 
to the withers ; the ears themselves edged with black, and with a marked white spot on the head behind 
them. Colour otherwise uniformly finely grizzled olive-grey all over, exactly as in S. exilis and 
S. concinnus. Claws both before and behind long, very sharp and much curved, so as to enable the 
animal to hang on to almost, or quite, vertical surfaces. Palms with five large pads. Soles with four 
subequal digital pads, and a small circular posterior pad ; back of sole hairy for about 9 or 10 millim. 
Skull very peculiarly shaped, with a short and broad cranial, and a disproportionally long and 
powerful facial portion, the distance from the tip of the nasals to a point between the anterior edges 
of the orbits 12’8 millim., as compared to 11'3 in &. exilis, and 11 millim. in S. melanotis, the latter an 
animal with the cranial part of the skull as large as, if not larger than, that of S. wliiteheadi. 
Teeth :—incisors narrow, strongly convex in front, orange above, nearly white below ; premolars -f, 
the anterior upper minute, circular in section. 
Dimensions of specimen c, an adult male in spirit :—Head and body 84 millim. ; tail, without hairs 
67, with hairs 98 ; hind foot 25’7 ; ear, without hairs 10'0, with hairs 26 ; head 29‘3; tip of muzzle to 
eye 18, to ear 24 ; forearm and hand 36'5 : heel to front of last foot-pad 12 - 3 ; hairy part of sole in 
centre line 9'4. 
This very beautiful little Squirrel is perhaps the most attractive of all the new Kina Balu mammals. 
It belongs to a group of pigmy squirrels, consisting of S'. exilis, S. melanotis, and a species only recently 
described by myself, namely S. concinnus ; the latter species comes from the Philippines, but the other 
