This list includes all serials, printed and processed, received by the Library of the United States Department of Agriculture, on a current basis, as of July 1, 1957. Only dailies or administrative use are omitted. A serial is defined as a publication that is issued either regularly or irregularly over an unspecified period of time. For the purposes of this list, a serial was considered current if it had been received in the Library at any time since January 1954, unless it was known to have ceased.

This study focuses on the Atlantic Forest tree rats of the genus Phyllomys (Rodentia: Echimyidae), one of the most poorly understood mammal genera inhabiting the coastal rain forests Brazil, the most threatened lowland tropical forest in the world. The author summarizes their distribution, ecology and evolution, using a combination of morphological and molecular analyses, describes two new species, and provides the first systematic revision of the genus, which was originally described in 1839.