1934. _Trichechus manatus latirostris_, Hatt, Bull. Amer. Mus. Nat. Hist., 66:538, September 10. _Distribution in Tamaulipas._--Reported from mouth of Río Grande (Miller and Kellogg, 1955:791); probably extirpated in state. =Tayassu tajacu angulatus= (Cope) Collared Peccary 1889. _Dicotyles angulatus_ Cope, Amer. Nat., 23:147, February, type from Guadalupe River, Texas. 1953. _Tayassu tajacu angulatus_, Dalquest, Louisiana State Univ. Studies, Biol. Sci. Ser., 1:207, December 28. _Distribution in Tamaulipas._--All of state, in suitable habitats. Records: Near El Mulato (Dice, 1937:256); Alta Cima (Goodwin, 1954:15); Rancho del Cielo (_ibid._); approx. 10 mi. N Cues (Leopold, 1947:443 map). =Odocoileus hemionus crooki= (Mearns) Mule Deer 1897. _Dorcelaphus crooki_ Mearns, Preliminary diagnoses of new mammals of the genera _Mephitis_, _Dorcelaphus_ and _Dicotyles_, from the Mexican border ..., p. 2, February 11, type locality summit Dog Mtns., 6129 ft., Hidalgo Co., New Mexico. 1939. _Odocoileus hemionus crooki_, Goldman and Kellogg, Jour. Mamm., 20:507, November 14. _Distribution in Tamaulipas._--Reported only from Cerro del Tigre (Leopold, 1959:504), but probably throughout western part of state. Now rare in the state. =Odocoileus virginianus= White-tailed Deer This species is relatively abundant in Tamaulipas from where three subspecies have been reported. Two specimens examined were shot at night. =Odocoileus virginianus miquihuanensis= Goldman and Kellogg 1940. _Odocoileus virginianus miquihuanensis_ Goldman and Kellogg, Proc. Biol. Soc. Washington, 53:84, June 28, type from Sierra Madre Oriental, 6000 ft., near Miquihuana, Tamaulipas. _Distribution in Tamaulipas._--Throughout Sierra Madre Oriental. An adult male, having two points on each antler, and a young male were examined and identified as this subspecies because of their small size and dark color. _Measurements._--A male from 15 km. W Rancho Santa Rosa affords measurements as follows: 1385; 245; 330; 154; condylobasal length, 234; length of maxillary tooth-row, 76.3; width across orbits at frontal-jugal suture, 100.9. _Records of occurrence_.--Specimens examined, 2: 15 km. W Rancho Santa Rosa, 4500 ft., 1; Ejido Santa Isabel, 2000 ft., 1. Additional records (Goodwin, 1954:15): San Antonio, 11 km. SW Joya de Salas; Rancho Pano Ayuctle. =Odocoileus virginianus texanus= (Mearns) 1898. _Dorcelaphus texanus_ Mearns, Proc. Biol. Soc. Washington, 12:23, January 27, type from Fort Clark [north of Eagle Pass on Big Bend of Rio Grande], Kinney Co., Texas. 1902. _Dama v[irginiana]. texensis_ [_sic_], J. A. Allen, Bull. Amer. Mus. Nat. Hist., 16:20, February 1.