no. 1809. MAMMALS FROM BORNEO AND VICINITY— LYON. 85 



collected in Sarawak by Hose, which have recently had their skulls 

 removed, and have been made over into modern study skins, have the 

 original colors of the underparts more or less dulled and rendered 

 somewhat pinkish. The fluid used to relax these skins in the 

 remaking was probably alcohol and water. In order to relax the 

 feet in the large number of squirrels of the vittatus group recently 

 collected by Dr. W. L. Abbott, the unlabeled hind foot and adjacent 

 part of leg of each specimen was soaked for about twenty-four hours 

 in tap water placed in a galvanized-iron receptacle. In a great many 

 of the specimens the bright ochraceous-rufous colors of the inner side 

 of the leg have become dulled and more pinkish on the foot and leg 

 that was soaked. In the last case it can hardly be probable that the 

 plain water brought about the change in color. It is more likely due 

 to the preservative, probably arsenic or a mixture of arsenic and 

 alum, used on the inside of the skin, and which had come through the 

 skin to the hairs by solution and osmosis. 



SCIURUS LAMUCOTANUS, new species. 



Type. — Skin and skull of adult female, Cat. No. 145405, collected 

 on Pulo Lamukotan, off west coast of Borneo, May 8, 1907, by Dr. 

 W. L. Abbott. Original number, 5201. 



Diagnostic characters. — A "red" bellied, "red" footed member of 

 the Sciurus vittatus group, differing from S. dulitensis of the neighbor- 

 ing mainland of Borneo in having a generally more ochraceous tone 

 on the upper parts, lighter under parts, broader but less clear dark 

 sides tripe and more buffy light side stripe. 



Color. — Type: Upper parts of head and body, a fine grizzle of 

 ochraceous-buff and blackish, the two colors about equally promi- 

 nent; upper surface of tail similar but grizzle coarser, and the 

 ochraceous-buff darkening to ochraceous and tawny ochraceous at 

 the tip; underside of tail with the ochraceous-buff replaced by 

 ochraceous and tawny ochraceous, the latter colors being in excess 

 of the black; light side stripe (5 by 65 mm.) buffy; dark side stripe 

 (12 by 80 mm.) blackish, sprinkled with a few light hairs; under- 

 parts and inner sides of fore and hind legs ochraceous-buff; outer 

 sides of fore and hind legs similar to adjacent parts of body; fore and 

 hind feet similar to outer side of legs, but more ochraceous-buff; 

 inner side of ears dull tawney ochraceous; outer side similar to head; 

 orbital ring and region about mouth ochraceous-buff. There is 

 some little difference shown in certain individuals of the series as to 

 brightness of under parts, but all are essentially like the type. 



Skull and teeth. — These show no special characteristics and appar- 

 ently do not differ from those of examples of Sciurus dulitensis from 

 Borneo. 



