of the Sciurus Prevostii Group. 171 
thighs have a greyish grizzled appearance; the shoulders, 
sides of the neck, and cheeks are also grizzled, although in 
some cases they are suffused with rufous. Tail with broad 
fulvous tips to all the hairs except those forming the end. 
Dimensions as in Se. Prevostit typicus. 
Hab. Kuching, Sarawak. 
Type 9, B.M. 99. 12.9. 47. Collected 15th Sept., 1896, 
by Mr. Charles Hose. 
Sciurus Prevostii navigator, subsp. n. 
Specimens from the island of Sirhassen form a very distinct 
race. ‘They are much smaller in size, the chestnut of the 
underparts is far brighter and more orange in tint. The 
lateral line, which starts from the shoulders, is narrow, clear, 
and well marked, and spreads out over the thighs as in 
Sc. P. sarawakensis. he shoulders are of a light fulvous, 
which becomes darker and grizzled on the cheeks and sides of 
the head. ‘he tail is pure black, and its hairs show no 
signs of fulvous tips. 
Dimensions (from skin) :—Head and body 235 millim., tail 
225, hind foot 47. 
Hab. Sirhassen Island. 
Type, B.M. 94. 9. 28. 14. Collected Sept. 22, 1893, by 
Mr. A. Everett. 
Seiurus Prevostii bangkanus, Schlegel. 
Seiurus Prevostii bangkanus, Schlegel, op. cit. p. 26, pl. i. fig. 2. 
Most nearly resembles Sc. P. Hume? from Klang, but 
may be distinguished by the cheeks and sides of the neck 
being iron-grey instead of white. 
Dimensions as in Se. P. typicus. 
Hab. Island of Bangka. 
Sciurus Prevostit borneoens’'s * (Miiller & Schlegel). 
Seiurus Prevosti, var borneoensis, Miill. et Sch., Verhand. over de Nat. 
Gesch. Overz. Bezitt., Zool. p. 86 (1839-44), 
Seturus Prevostit borneoensis, Schlegel, op. crt. p, 26, pl. i. fig. 3. 
This form, as one might expect, is most closely allied to 
Se. P. kuchingensis from Kuching, which is, in fact, not 
very far north of Pontianak. It is distinguished by the fact 
that the black of the back is not sharply defined from the lateral 
* This name antedates that given by Gray to a Bornean form of S. hip- 
purus (Ann. & Mag. Nat. Hist. xx. 1867, p. 283), For that I would 
suggest the name of S. Aeppurus Gray?. 
