THE MAMMALS COLLECTED IN SAN MIGUEL 
ISLAND, PANAMA, BY W. W. BROWN, JR. 
OUTRAM BANGS. 
IN the spring of 1900 Mr. W. W. Brown, Jr., made a short 
collecting trip to San Miguel Island, the largest of the islands 
in the Bay of Panama, known as the Archipelago de las Perlas. 
Here he stayed for nearly a month, — middle of April to middle 
of May, — and in this time secured, he believes, representa- 
tives of all the species of land mammals that occur on the 
island, with the possible exception of some bats. 
San Miguel Island is about fifteen miles in length and lies 
twenty miles distant from the nearest point on the mainland, 
and sixty miles from Panama. It is composed of low-lying hills 
clothed in heavy tropical forest, hot, damp, and unhealthy. 
The collection of birds made on this trip has already been 
reported upon.! The birds of the island are for the most 
part like those of the adjacent mainland, and five species only 
were considered different enough to receive distinctive names, 
Most of the mammals, on the other hand, seem to be well dif- 
ferentiated island species. I am much indebted to Gerrit S. 
Miller, Jr., for identifying the bats for me, and to Dr. J. A. 
Allen for comparing the large opossum with the various forms 
he has lately described from different parts of northern South 
America. 
One hundred and fifty-seven mammals, belonging to twelve 
Species, were collected by Mr. Brown in San Miguel Island, 
as follows 
Marmosa Sulviventer nob. : ‘ 4 specimens 
Didelphis karkinophaga cauce An X 
l Bangs, Outram. Birds of San Miguel Island, Panama, Awé, vol. xviii 
(January, 1901), No. remi 
angs, Outram. A New Honey Creeper from San Miguel Island, Panama, 
Proc. New Eng. Zoil. Club, vol. ii = 8, 1901), pp. 51, 52- 
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