lls of mountains in
south-central Coahuila (see fig. 1).

_Comparisons._--From _Cratogeomys castanops goldmani_, found to the
southwest, _subsimus_ differs in: Body larger; hind foot larger; upper
parts paler, more yellowish and less rufous; skull larger and rougher,
having more prominent ridges and crests and deeper fossae for
attachment of muscles; zygomata more widely flaring; palate longer;
rostrum broader; nasals longer; squamosal breadth greater; maxillary
teeth larger. From _C. c. subnubilus_, found to the south, _subsimus_
differs in: Body larger; tail and hind foot shorter; upper parts
paler, more yellowish-buff and less blackish; skull decidedly larger
in all respects. From _C. c. planifrons_, found at higher elevations
to the southeast, _subsimus_ differs in the same respects as
_subsimus_ differs from _subnubilus_. For comparisons between
_subsimus_ and subspecies to the west, north and northeast, see
accounts above.

TABLE 1. ~Measurements of Adult Female Cratogeomys
from Coahuila, Mexico~

Table legend:
Column A: No. av. or cat. no.
Column B: Total length
Column C: Length of tail
Column D: Length of hind foot
Column E: Condylobasal breadth
Column F: Zygomatic breadth
Column G: Length of palate
Column H: Breadth of rostrum
Column I: Length of nasals
Column J: Squamosal breadth
Column K: Alveolar length of maxillary tooth-row

========================================================================
A B C D E F G H I J K
------------------------------------------------------------------------
_C. c. convexus_, Villa Acuna
52259 260 86 37 50.6 31.7 33.8 11.7 16.7 29.1 9.3
52261 265 83 38 49.3 31.6 32.9 11.8 15.8 28.9 10.6

_C. c. bullatus_, vicinity of Nava
5 Av. 256 80 36 47.4 30.6 32.6 10.7 17.1 27.9 9.5
Min. 242 72 35 47.0 30.6 32.3 10.0 16.5 27.5 9.2
Max. 263 85 37 47.7 31.1 32.9 11.6 17.8 28.2 9.8

_C. c. ustulatus_, vicinity of Don Martin
8 Av. 273 74 36 51.4 33.5 35.4 11.8 18.8 30.1 10.0
Min. 261 64 35 50.7 32.6 34.8 11.0 17.8 29.1 9.3
Max. 280 83 38 52.1 34.1 36.5 12.5 19.2 30.8 10.6

_C. c. jucundus_, Hermanas
4 Av. 296