248 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. xxxi 



of about 30 fathoms, while an isolated sounding of 49 fathoms is 

 recorded between Singapore Island and Batam. The average depth 

 of the water between the Archipelago and Sumatra is less than in the 

 straits, that separating the Linga group from the larger island nowhere 

 exceeding 20 fathoms, while that between the Rhio group and the coast 

 scarcely reaches 10 fathoms. The causes which have led to these 

 peculiarities in the conformation of the sea bottom have probably 

 influenced the distribution of the mammals of the Archipelago, but 

 our present knowledge of the fauna of the extreme southern portion 

 of the Malay Peninsula is too imperfect to furnish an}' satisfactory 

 proof. 



The Archipelago has been visited four times by Dr. Abbott, in July, 

 1899 (Linga^')i August, and September, 19(»1 (Linga and Sinkep''), 

 August and September, 1902 (Bingtang, Sugi, Sugi Bawa') and May, 

 June, July, and August, 1903 (Karimon, Karimon Anak, Kundur, 

 Ungar, Durian, Little Durian, Jan, Moro Kechil, Sanglar, Bakong, 

 Panaga, Sebang, Penuba, Sinkep''). His collections of mammals, num- 

 bering about 700 specimens, all of which he has presented to the U. S. 

 National Museum, form the subject of this paper. The}^ are sup- 

 plemented by a small but interesting lot from Batam, presented by 

 Mr. C. B. Kloss. 



So far as I am aware, the mammal fauna of the Rhio-Linga Archi- 

 pelago was quite unknown previous to Dr. Abbott's explorations. 

 Thus far the number of species takenjs 49, l)ut this will undoubtedly 

 be nuich increased when the important islands of Chombol, Bulang, 

 Rempang, Galong, and Panjang are visited. More than half of these, 

 28 in all, are, so far as is now known, peculiar to the Archipelago: 

 Tmgidus nixjrocinctiis^ T. Jvrmos'u.s\ T. It/teNcens^ T. flavicoUh^ T. prr- 

 flavus^ T. pretiosus, -T. pretiellus^ T. niyrleoUis^ T. ruheus^ T. Huhrufus^ 

 Sus rhionis^ Ratiifa notahilis^ R. conspicua^ R. carimonensis^ R. inslg- 

 nis, R. condurensu^ R. eonfinis^ Sciurus cariinonensis^ 8. condurensis^ 

 ,Scl'uropterus ariioenvs^ Arctogalidia simplex^ A. fusca, Paradoxuriis 

 hrunneipes^ Tiqmia castanea^ T. jj/ixura, JVannoscirus pnlcher Preshytis 

 rhionis^ and P. cana. Of the remaining species, 13 {3fanis jaivinica, 



«See Miller, Proc. Washington Acad. Sci., II, pp. 203-246, August 20, 1900. 



6 See Miller, Proc. Acad. Nat. Sci., Philadelphia, 1902, pp. 143-159, June 11,1902. 



c No general account of this collection has been published, but the following new 

 species were described in 1903: (a) in paper entitled. Descriptions of Eleven new 

 Malayan Mouse Deer (Proc. Biol. Soc. Washington, XVI, pp. 31-44, March 19, 1903), 

 Tnujulus lulescens (p. 32), T. Jiavkollu (p. 33), T. formosus (p. 34), T. subrufm (p. 37), 

 T. rubeus (p. 40); {b) in paper entitled. Seventy new Malayan Mammals (Smith- 

 sonian Miscell. Coll., XLV, pp. 1-93, November 6, 1903), Ratufa insignls (p. 4), 

 Ratufa coiispicna (p. 5), Tupaia cnstanea (p. 54), Prc^ibytia rJiionis (p. 64). 



rf On this collection nothing has hitherto been ])ublished except the description of 

 Sus rhionis and the record of Smoi from Kundur (Proc. TJ. S. Nat. Mus., XXX, 1906, 

 p. 741). 



