sidered together in each population studied.

TABLE 1. ANALYSIS OF SECONDARY SEXUAL VARIATION IN ADULT REITHRODONTOMYS
MEGALOTIS FROM THE SOUTHERN PART OF THE NEBRASKA PANHANDLE. FOR EACH
MEASUREMENT, THE NUMBER OF SPECIMENS USED, THE AVERAGE, THE EXTREMES,
AND ONE STANDARD DEVIATION ARE GIVEN.

CHARACTER | Males | Females
-------------+--+-----+------------+------+--+-----+----------+-----
Total
length |27|135.0|(121-149) |+-6.14 |32|141.0|(127-149) |+-5.36
-------------+--+-----+------------+------+--+-----+----------+-----
Length of
tail-
vertebrae |27| 63.9|( 56-74) |+-4.63 |32| 65.2|(58-73) |+-4.06
-------------+--+-----+------------+------+--+-----+-----------+-----
Length
of hind
foot |27| 17.0|( 16-18) |+-0.60 |32| 17.3|(15-19) |+-0.81
-------------+--+-----+------------+------+--+-----+-----------+-----
Length of
ear from
notch |27| 12.9|( 12-14) |+-0.55 |32| 13.0|(12-14) |+-0.61
-------------+--+-----+------------+------+--+-----+-----------+-----
Greatest
length of
skull |27| 21.0|( 20.2-21.8)|+-0.43 |28| 21.3|(20.4-22.2)|+-0.48
-------------+--+-----+------------+------+--+-----+-----------+-----
Zygomatic
breadth |25| 10.7|( 10.3-11.0)|+-0.21 |28| 10.9|(10.4-11.3)|+-0.25
-------------+--+-----+------------+------+--+-----+-----------+-----
Breadth of
braincase |27| 10.0|( 9.6-10.5)|+-0.22 |28| 10.1|(9.8-10.7) |+-0.18
-------------+--+-----+------------+------+--+-----+-----------+-----
Depth of
cranium |26| 7.9|( 7.4-8.4) |+-0.20 |28| 7.9|( 7.7-8.3) |+-0.15
-------------+--+-----+------------+------+--+-----+-----------+-----
Length of
rostrum |27| 7.3|( 6.8-7.6) |+-0.21 |28| 7.4|( 6.9-8.0) |+-0.27
-------------+--+-----+------------+------+--+-----+-----------+-----
Breadth of
rostrum |27| 3.8|( 3.6-4.1) |+-0.11 |28| 3.8|( 3.5-4.0) |+-0.12
-------------+--+-----+------------+------+--+-----+-----------+-----
Length of
incisive
foramen |27| 4.4|( 4.1-4.6) |+-0.10 |28| 4.5 ( 4.1-4.9) |+-0.19
-------------+--+-----+------------+------+--+-----+-----------+-----
Length of
palate |26| 3.5|( 3.1-3.8) |+-0.18 |28| 3.5 ( 3.2-4.0) |+-0.15
-------------+--+-----+------------+------+--+-----+-----------+-----
Alveolar
length of
maxillary
tooth-row |27| 3.4|( 3.2-3.7) |+-0.14 |28| 3.4|( 3.2-3.7) |+-0.13
-------------+--+-----+------------+------+--+-----+-----------