Measurements (in millimeters) of the mature baculum (fig. 2, No. 40758 KU) are: total length, 6.2; lateral diameter of base, 2.6; dorso-ventral diameter of base, 1.4; lateral diameter of the shaft near the middle of the bone, 0.6. Except for being smaller, the bacula of the younger goldmani are like the mature ones.
Assistance with field work is acknowledged from the Kansas University Endowment Association and the National Science Foundation. The figures were drawn by Victor Hogg. Bacula were prepared for study following the method outlined by White (Jour. Mamm., 32:125, February 15, 1951).
Specimens examined.—Total, 15, all in the Museum of Natural History at the University of Kansas. Localities within any one state are arranged from north to south. Chihuahua: Sierra Almagre, 6000 ft., 12 mi. S Jaco, 1. Coahuila: 17 mi. N and 8 mi. W Saltillo, 5200 ft., 2; 3 mi. SE Torreón, 3800 ft., 7. Durango: 1 mi. SSE Mapimí, 4100 ft., 1; 4 mi. WSW Lerdo, 3800 ft., 1; 5 mi. SE Lerdo, 3800 ft., 1. Zacatecas: Conception del Oro, 7680 ft., 1. San Luis Potosí: 10 mi. NE San Luis Potosí, 6000 ft., 1.
Other records.—Coahuila: Jaral; Saltillo (Goldman, 1910:82). San Luis Potosí: Cerro Peñon Blanco; Ventura; Santa Teresa; city of San Luis Potosí (Dalquest, loc. cit.).
Transmitted February 8, 1955.