CALIFORNIA INSTITUTE OF TECHNOLOGY MAMMALS: SERIAL FIELD CATALOGUE Locality San Carlos Bay, Sanna, Mexico. lat. 27°57'N long 110°5'W Alt. 30 feet Coll. No. 50,336 Date: Dec. 25, 1931 Sex: ♀ Neotoma L. 25.3 T. 10.9 H.F. 3.3 E. 2.3 skin and skull Coll. 3234-4743 rocky hillside Coll. No. 50,337 Date: Dec. 25, 1931 Sex: ♂ Peromyscus L. 18.4 T. 10.7 H.F. 1.9 E. 1.5 skin and skull Coll. 3235 rocky hillside Coll. No. 50,338 Date: Dec. 25, 1931 Sex: ♂ Peromyscus L. 18.1 T. 10.2 H.F. 1.9 E. 1.5 skin and skull Coll. 3236 rocky hillside Coll. No. 50,339 Date: Dec. 25, 1931 Sex: ♂ Peromyscus L. 17.0 T. 9.4 H.F. 1.9 E. 1.6 skin and skull Coll. 3237 rocky hillside Coll. No. 50,340 Date: Dec. 25, 1931 Sex: ♂ Peromyscus Cuij L. 20.4 T. 12.0 H.F. 2.6 E. 1 skin and skull Coll. 3238 rocky hillside Coll. No. 50,341 Date: Dec. 25, 1931 Sex: ♂ Peromyscus Cuij L. 17.6 T. 11.1 H.F. 2.5 E. 6 skin and skull Coll. 3239 rocky hillside Coll. No. 50,342 Date: Dec. 25, 1931 Sex: ♂ Peromyscus Cuij L. 15.5 T. 8.4 H.F. 2.5 E. 6 skin and skull Coll. 3240 rocky hillside