Description: English: Microtus longicaudus molars, left upper and left lower. Date: 1888. Source: The American Naturalist, Vol. 22, No. 262 (Oct., 1888), pp. 932-937 Published by: The University of Chicago Press for The American Society of Naturalists Article Stable URL:
https://www.jstor.org/stable/2451396?seq=4. Author: C Hart Merriam.