MAMMALS COLLECTED IN WESTERN BORNEO BY DR. 

 W. L. ABBOTT. 



By Marcus Ward Lyon, Jr., 



Assistant Curator, Division of Mammals, U. S. National Museum. 



INTRODUCTION. 



From about the inicUUe of June until the end of September, 1905, 

 Dr. W. L. Al)l)ott occupietl himself in exploring western Borneo, 

 where some three lmn(h"e(l specimens of mammals were collected, all 

 of which he presented to the United States National Museum. A 

 few preliminary notices « of these have been published, but the col- 

 lection as a whole is treated of for the first time in the followino- pages. 



After collecting in the vicinity of Pontianak and along the Sungei 

 wSama, Doctor Abbott ascendetl the Landak River to about Ngabong, 

 making collections along the shores as he returned down that stream. 

 He next ascended the Kapuas River as far as Sanggau, where the 

 wSakaiam River, or Sungei Sakaiam, flows into the Kapuas. P>om 

 Sanggau Doctor Abbott ascended the Sakaiam for 105 miles, reach- 

 ing Mrowi, near the Sarawak frontier. As this trip was made in a 

 small boat, no attempt was made to collect animals, his efforts being 

 directed toward securing ethnological objects from the Dyaks. Col- 

 lections of mammals were, however, made on the trip down the 

 Kapuas from Sanggau. 



The maps publishe<l on the region of w^estern Borneo show that the 

 lower courses of the Landak and Kapuas rivers pass tlu'ough an area 

 of lowland swamps, as would be inferred from the tortuous courses 

 of the rivers and their numerous mouths. The upper courses of the 



a Pigmy Squirrels of the Nannosciurus melanotis group, Proc. Biol. Soc. Wash- 

 ington, XIX, pp. 51-56, May ], 1906. 



Notes on the Slow Lemurs, Proc. U. S. Nat. Mus., XXXI, pp. 527-538, pi. xiii, 

 November 9, 1906. 



Mammals of Banka, Mendanau, and Billiton, islands between Sumatra and Borneo, 

 Proc. U. S. Nat. Mus., XXXI, pp. 575-612, December 18, 1906. Mention of Rusa 

 broohei, Muntiacus pleiharicas, Nannosciarus borneanus, and Cynopterus brachyotis. 



Notes on some squirrels of the Sciurus hippurus group, with descriptions of two new 

 species, Smithsonian Misc. Coll., L, Pt. 1, pp. 24-29, April 8, 1907. 



Proceedings U. S. National Museum, Vol. XXXIII— No. 1577. 



547 



