These wood rats were taken in rocks and crevices at the base of a small hill in thick vegetation growing in deep humus. Schaldach termed the trapping site as "arid tropical tending toward humid tropical". _Measurements._--The subadult, male holotype measures as follows: Total length, 325; length of tail, 154; length of hind foot, 36; length of ear from notch, 29; basilar length (of skull), 33.9; zygomatic breadth, 22.1; interorbital breadth, 5.7; length of nasals, 15.2; length of incisive foramina, 8.7; length of palatal bridge, 8.5; least breadth of palate between first upper molars, 2.7; greatest breadth of interpterygoid space, 4.1; alveolar length of upper molariform tooth-row, 9.6. The adult, male, no. 37062, measures as follows: Total length, 380; tail vertebrae, 195; hind foot, 42; ear from notch, 31; interorbital breadth (of skull), 6.4. _Specimens examined_, 2, from the type locality. ~Rattus rattus~ subsp. Black Rat _Specimens taken_, 2 from 70 km. [by highway] S Ciudad Victoria and 6 km. W of the [Pan-American] highway [at El Carrizo]. ~Mus musculus~ subsp. House Mouse _Specimen examined_, 1 from 12 km. N and 4 km. W Ciudad Victoria. ~Nasua narica tamaulipensis~ Goldman Coati _Nasua narica tamaulipensis_ Goldman, Proc. Biol. Soc. Washington, 55:80, June 25, 1942. (Type from Cerro de la Silla, near Monterrey, Nuevo Leon, Mexico.) _Specimen examined_, 1 from 70 km. [by highway] S Ciudad Victoria and 2 km. W El Carrizo. _Remarks._--Several bands of coatis were observed in the vicinity of the village of El Carrizo. One skull of a male was obtained. _Transmitted June 8, 1951_. 23-8338 * * * * * Transcriber's Notes Italicized text is shown within _underscores_. Bold text is shown within ~tildes~. Page 210: Saeugthiere may be a typo for Saeugethiere. End of Project Gutenberg's Mammals from Tamaulipas, Mexico, by Rollin H. Baker