146 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



EXPLANATION OF PLATES. 



Plate 1. 

 ( About one-third natural size. ) 

 Figs. 1 and 3. Skull of type of Muntiacus rubidus, Cat. No. 151863, U.S.N. M., Pamu- 

 kang Bay, southeastern Borneo, p. 73. 

 2 and 4. Skull of Muntiacus pleiharicus, Cat. No. 154384, U.S.N.M., Pamukang 

 Bay, southeastern Borneo, p. 71. 



Plate 2. 

 (About one-third natural size.) 

 Fig. 1. Skull of Muntiacus pleiharicus, Cat. No. 154384, U.S.N.M., Pamukang Bay, 

 southeastern Borneo, p. 71. 

 2. Skull of type of Muntiacus rubidus, Cat. No. 151863, U.S.N.M., Pamukang 

 Bay, southeastern Borneo, p. 73. 



Plate 3. 

 (About one-fourth natural size.) 

 Antlers of Bornean muntjacs collected by Dr. W. L. Abbott in southwestern 

 Borneo. 

 Fig. 1. Cat. No. 153772, U.S.N.M., Kendawangan River. 



2. Cat. No. 153762, U.S.N.M., Kendawangan River. 



3. Cat. No. 153756, U.S.N.M., Kendawangan River. 



4. Cat. No. 153763, U.S.N.M., Kendawangan River. 



5. Cat. No. 145364, U.S.N.M., Sem pang River. 



6. Cat. No. 153766, U.S.N. M., Kendawangan River. 



7. Cat. No. 153764, U.S.N.M., Kendawangan River. 



Plate 4. 



Squirrels of the Sciurus prevostii group collected by Dr. W. L. Abbott on the 

 Bornean mainland (slightly more than one-fourth natural size; reproduced directly 

 from the specimens), pp. 79 to 81. 



Fig. 1. Sciurus borncoensis palustris, adult male, Cat. No. 142331, U.S.N.M., Kapuas 

 River, north bank hear mouth, western Borneo, September 23, 1905. 



2. Sciurus borncoensis borncoensis, adult male, Cat. No. 142308, U.S.N. M., Kapuas 



River, north bank, at Sanggau, western Borneo, August 25, 1905. 



3. Sciurus sanggaus, adult female, Cat. No. 142328, U.S.N.M., Kapuas River, 



south bank, September 20, 1905. 



4. Sciurus atricapillus, adult female, Cat. No. 154292, U.S.N.M., Balik Papan 



Bay, southeastern Borneo, February 19, 1909. 



Plate 5. 



Head of a freshly killed adult male Bornean orang utan, photographed by Dr. 

 W. L. Abbott, p. 144. 



Plate 6. 



Freshly killed adult male Bornean orang utan, photographed by Dr. W. L. Abbott, 

 p. 144. 



Plate 7. 



Head of a freshly killed adult female Bornean orang utan, photographed by Dr. 

 W. L. Abbott, p. 144, 



