It is not justified at present to maintain that the Angels Peak species occupy an earlier position in the Torrejonian than do those obtained from outcrops between Kimbetoh and the heads of the two forks of Arroyo Torrejon. Indeed, the stratigraphic position of the Angels Peak pocket with a considerable thickness of Torrejonian strata beneath it, tends to argue against such a view. Nevertheless, it is possible, if not probable, that such is the case, or at least that detailed work would reveal a series of faunules of slightly different ages in the Torrejonian stage of the Nacimiento formation. Of course, chance in collecting, as well as geographic and ecologic differences, play their part in giving such a local faunule as that at Angels Peak its somewhat different aspect, but these factors may not account altogether for the observed differences. LITERATURE CITED GAZIN, C. L. 1941. The mammalian faunas of the Paleocene of central Utah, with notes on the geology. Proc. U. S. Nat. Mus., 91, no. 3121: 1-53, 3 pls., 29 figs. in text. GRANGER, WALTER. 1917. Notes on Paleocene and lower Eocene mammal horizons of northern New Mexico and southern Colorado. Bull. Amer. Mus. Nat. Hist., art. 32: 821-830, 2 pls., 1 fig. MATTHEW, W. D. 1937. Paleocene faunas of the San Juan Basin, New Mexico. Trans. Amer. Philos. Soc., n. s., 30: i-viii, 1-510, 65 pls., 85 figs. in text. OSBORN, H. F. 1929. The titanotheres of ancient Wyoming, Dakota, and Nebraska. U. S. Geol. Surv., Monog. 55 (2 vols.): i-xxiv, i-xi, 1-953, 236 pls., 797 figs. in text. SIMPSON, G. G. 1937. The Fort Union of the Crazy Mountain Field, Montana, and its mammalian faunas. U. S. Nat. Mus., Bull. 169: i-x, 1-287, 10 pls., 80 figs. in text, 62 tbls. 1948. The Eocene of the San Juan Basin, New Mexico. Amer. Jour. Sci., 246: 257-282, 363-385, 5 figs. in text. _University of Kansas, Museum of Natural History, Lawrence, Kansas. Transmitted July 1, 1950._ * * * * * Transcriber's Notes Italicized text is shown within _underscores_. Page 4: Changed preceeding to preceding (field work in the preceding summer).