In Rodents, however, there is a difference in the organs, not only at maturity, but in every rutting season, at any rate in muridae such as rats and others.
"Hormones and Heredity"
J. T. Cunningham
The Arvicolidae of Jerdon's work is merely a sub-family of muridae.
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale
Of these the muridae take the first place, as containing the greater number of genera.
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale