y woodrat,
_Neotoma goldmani_. Solid circles represent specimens
examined; hollow circles represent others reported but not
examined.]

The baculum of _goldmani_, when compared with bacula and with figures
of these bones in Burt and Barkalow (Jour. Mamm., 23:291 and 293,
August 13, 1942) of species representing the _floridana_, _lepida_,
_albigula_, _mexicana_, _fuscipes_, and _cinerea_ groups, was found to
resemble most closely the baculum of _albigula_ in general proportions
(ratio of length to lateral diameter of base) and in having a distinct
knob at the distal end. The baculum of _goldmani_ differs slightly
from that of _albigula_ in having a less downwardly curved shaft and
in having a less pronounced median dorsal depression at the proximal
end. Although _goldmani_ bears some external resemblance to _lepida_,
the cranial characters mentioned above and the size and shape of the
baculum show that _goldmani_ is best arranged as a member of the
_albigula_ group.

[Illustration: FIGURE 2. Dorsal, end (proximal), and lateral
views of the baculum of _Neotoma goldmani_, adult, No. 40758
KU, x 5.]

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 Torreon, 3800 ft., 7. _Durango_: 1 mi. SSE Mapimi, 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 Potosi_: 10 mi. NE San Luis Potosi, 6000 ft., 1.

_Other records._--_Coahuila_: Jaral; Saltillo (Goldman,
1910:82). _San Luis Potosi_: Cerro Penon Blanco; Ventura;
Santa Teresa; city of San Luis Poto