Nilopegamys plumbeus. Drawn by L. L. Pray after a field study by L. A. Fuertes.

Nilopegamys plumbeus. Drawn by L. L. Pray after a field study by L. A. Fuertes.
Photographer: L. L. Pray & L. A. Fuertes

Source: Osgood, Wilfred Hudson. 1928. A new genus of aquatic rodents from Abyssinia.  Field Museum of Natural History Zoological series 12(15):185-189. Biodiversity Heritage Library: http://biodiversitylibrary.org/page/2827395