Occasional Notes. 123 
did not live in the house. It is closely allied to a Peru- 
vian form, from which, however, it can easily be distin- 
guished by its softer, darker, and more velvety fur, and 
by its black toes — in the Peruvian form the toes are 
white. 
The rat has been named after Mr. SCLATER, and is 
thus described : — 
Hesperomys (Rhipidomys) sclateri, sp. n. 
Fur short, close, very soft and velvety. General colour uniform dark 
ashy grey, the tips of the hairs below white or pale rufous, line of 
demarcation not strongly marked \ bases of all the hairs slate-coloured. 
Hairs on both fore and hind feet, including the fingers and toes, all 
dark brown or black. Ears, when laid forward, reaching just to the 
centre of the eye ; no projection on their anterior border ; their backs 
hairy, black. Tail long, uniformly black, thickly hairy, the hairs about 
3 or 4 mm. long throughout, except just at the base, where they are 
shorter, and at the extreme tip, where they are 10 or 12 mm. long; the 
rings of scales well-marked, 15 or 16 to the centimetre. Mammae 6, 
one axillary and two inguinal pairs. Interdental palate-ridges 6. 
Foot-pads broad, smooth, rounded ; soles naked, quite smooth. 
Skull exceedingly similar to that of H. leucodactylus, Tsch. (figured 
P. Z. S. 1884, pi. xliv. fig. 8), but rather longer and narrower, especially 
in the cranial portion, with the supraorbital edges more strongly 
developed, and with the incisors rather longer and heavier. 
Dimensions of the type, an adult female in spirit : — Head and body 
133 mm., tail 172, hind foot 33, forearm and hand 39, ear, above 
crown, 16, head 43, muzzle to eye 18*5. 
Skull. Basal- length 31*5, greatest breadth 19; nasals, length I2'8; 
length of molar series 6*4 ; back of incisors to front of m'. 10*2; palatine 
foramen, length 8*0 ; interorbital constriction 6'%. 
British Guiana & West Indian Woods at the Edin- 
burgh International Forestry Exhibition, — The follow- 
ing notes on Woods exhibited by British Guiana and the 
Q2 
