Specimens examined average slightly smaller than the type specimen, especially in total length, length of hind foot, length of skull and length of maxillary tooth-row. Davis (1951:219) also noted some of these same differences in a specimen examined by him from two miles south of Ciudad Victoria. The variation in color is great among Tamaulipan specimens. Of the 15 examined, two are Dark Mummy Brown, six are Mummy Brown, six are Sudan Brown, and one is paler than Sudan Brown. I follow Goodwin (1960:6) in using the specific name _ater_. _Records of occurrence._--Specimens examined, 15: 3 mi. NE Guemes, 2; Rancho Santa Rosa, 25 km. N, 13 km. W Cd. Victoria, 260 m., 2; Rancho Pano Ayuctle, 6 mi. N Gómez Farías, 300 ft., 1; Rancho Pano Ayuctle, 25 mi. N El Mante and 3 km. W Pan-American Hwy., 2200 ft., 8; 8 km. W, 10 km. N El Encino, 400 ft., 2. Additional records (Davis, 1951:219): 2 mi. S Cd. Victoria; Altamira. =Ateles geoffroyi velerosus= Gray Spider Monkeys 1866. _Ateles vellerosus_ Gray, Proc. Zool. Soc. London, p. 773 (for 1865), April, type locality "Brasil?"; restricted to Mirador, 2000 ft., about 15 mi. NE Huatusco, Veracruz, by Kellogg and Goldman, Proc. U. S. Nat. Mus., 96:33, November 2, 1944. 1944. _Ateles geoffroyi vellerosus_, Kellogg and Goldman, Proc. U. S. Nat. Mus., 96:32, November 2. _Distribution in Tamaulipas._--Probably extreme southern part. No specimens of this monkey have been taken in Tamaulipas although Kellogg and Goldman (1944:34) pointed out that it probably occurred in the tropical forest of the southern part of the state. Later, Villa (1958:347) reported that A. Malaga Alba saw monkeys in 1954 at Barranca de Caballeros, approximately 25 kilometers north-northwest of Ciudad Victoria. No other report of their occurrence in the state has been forthcoming. =Dasypus novemcinctus mexicanus= Peters Nine-banded Armadillo 1864. _Dasypus novemcinctus_ var. _mexicanus_ Peters, Montsb. preuss Akad. Wiss., Berlin, p. 180, type from Matamoros, Tamaulipas (see Hollister, Jour. Mamm., 6:60, February 9, 1925). 1920. _D[asypus]. novemcinctus mexicanus_, Goldman, Smiths. Misc. Coll., 69 (5):66, April 24. _Distribution in Tamaulipas._--Probably state-wide except on Mexican Plateau; presently known only from five localities. A 13-pound female from four kilometers west-southwest of La Purisima was captured after it was forced by the collector (Dalquest) and his dog out of the burrow that was under a log. A young specimen examined from seven kilometers southwest of La Purisima was captured by a dog. A partial skeleton including the skull was picked up on the barrier beach at a place 33 miles south of Washington Beach. _Records of occurrence._--Specimens examined, 3 (see text immediately above).