Mr. O. Thomas on Agoutis. 313 
Nearly seventy years ago an agouti was collected on 
Gorgona Island, off the west coast of Colombia, by Capt. 
Kellett and Lieut. Wood, during the cruise of H. M.S. § es 
dora,’ The specimen was registered as “* Dasyprocta aguti,” 
and, being immature and not in good condition, has not 
hitherto been re~examined. 
Now, however, on comparison with skulls of similar age 
of the allied species I find that it is se mueh smaller as to 
deserve specific distinction. 
Dasyprocta pandora, sp. n. 
General colour-characters of D. variegata, but size much 
smaller. 
Fore-back and sides grizzled yellow and black, the yellow 
more prominent on the middle back; lengthened rump-hairs 
black, with yellowish tips. Feet black, with a few fine 
yellow hairs intermixed. 
Dimensions of the type:— 
Hind foot (dry) 90 mm. 
Skull: greatest length 89; zygomatic breadth 42:5; 
nasals 31 ; palatilar length 33:5; combined length of mp’, 
m*, and m? 13:2 ; mp*, length 4°9, breadth 4. 
Hab. Island of Gorgona. 
Type. Immature male. B.M.no. 50.1. 26.29. Collected 
and presented by Capt. Kellett and Lieut. Wood, of H.M.S. 
* Pandora.’ 
No doubt this is a diminished insular representative of 
D. variegata. Its reduetion in size is shown by the fact that 
skulls of that animal of about the same age are upwards of 
105 mm. in length, while the three teeth above measured 
may together be 15 mm. in length, mp* being 5°6 x 4°3, and 
the other teeth also conspicuously more bulky. 
That this animal is a genuine native of Gorgona, about 
which I had always had a doubt, has been proved by 
Mr. Bangs, who, in 1908, included a specimen of it in his 
list of the mammals of the island*. His specimen was also 
young-——too young for certain determination,—and he only 
provisionally referred it to D. variegata. 
The other two land-mammals obtained by him— Cedus 
curtus and Proechimys gorgone—were both described as new. 
* Bull. Mus, Harvard, xlvi. p. 89. 
Ann, & Mag. N. Hist. Ser. 8. Vol. xx. 21 
