620 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL. XXXIV. 
(See map, page 623.) From February 24 until April 3, 1906, he col- 
lected on Pulo Rupat, on the mainland opposite, on the small island of 
Payong in Salat Rupat and on the large islands of Bengkalis and 
Padang. (See map, page 623.) During the autumn of the same year 
Doctor Abbott visited that part of Sumatra again for a period of 
nearly five months, October, 1906, to February, 1907. He made col- 
lections from along the banks of the Siak and the Little Siak rivers, 
from the islands of Merbau, Tebing Tinggi, Rangsam, and Penjalei, 
as well as from the mainland of Sumatra opposite them. (See map, 
page 623.) The mammals of these several collections are described in 
detail below. Several preliminary notices of some of the specimens 
have already been printed, but the collections as a whole are treated 
of here for the first time. Reference to the earlier papers will be 
found in the synonymies of the species to which they refer. 
In 1889 Dr. F. A. Jentink,¢ director of the Leyden Museum, pub- 
lished a short paper on a collection of mammals made in eastern 
Sumatra by Dr. B. Hagen. In 1905 Mr. Gustav Schneider ° published 
a detailed account of his travels in eastern Sumatra and the mammals 
which he collected there. The names applied by these authors to the 
various species of mammals in eastern Sumatra are given under the 
synonymies of the species listed below. 
DESCRIPTIONS OF LOCALITIES. 
The following account of the localities visited by Doctor Abbott are 
taken almost entirely from his letters and field notes, and a study of 
the maps of the region.° 
Aru Bay.—(Map, page 621.) This is a small indentation on the east 
coast of Sumatra at about longitude 98° 15’ KE. and latitude 4° 10’ N. 
One fresh water river, the Besitan, flows into it. In addition to that 
several tidal creeks empty into it.. The shores of the bay and the 
rivers generally are fringed with mangroves. <A short distance back 
from the rivers the country is rolling. A rather large island, Pulo 
Sembilan, is at the entrance to the bay. 
The shooting ground was the peninsula between the lower Besitan River and 
the smaller Sungei Tongkam. This was covered to a great extent with heavy 
forest, through which many paths and roads had been made by the Chinese 
“On a collection of mammals from EHKast-Sumatra, Notes Leyden Museum, XI, 
pp. 17-80, January, 1889. 
6 Ergebnisse zoologischer Forschungsreisen in Sumatra. Erster Teil. Situge- 
tiere (Mammalia). Gesammelt und bearbeitet von Gustav Schneider in Basel. 
Zool. Jahrb. Syst., XXIII, pp. 1-172, pls. 1-111, sketch maps 1 and 2. 
¢ Hspecially, Atlas van Nederlandsch Oost-Indié, bij het topographisch bureau 
te Batavia samengesteld in de jaren 1897-1904. (Omgewerkte uitgave van 
den atlas van J. W. Stemfoort en J. J. Ten Siethoff,) Bij de topographisch 
inrichting te ’s Gravenhage gereproduceerd in de jaren 1898-1907, onder leiding 
van den Directeur C. A. Eckstein uitgegeven van het Departement van Kolonién, 
