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Show 242 MR. OLDFIELD THOMAS ON THE MAMMALS [Nov. 3, 1901 *, a smaller animal occurring near Rio Janeiro. It is possible that the more coarsely mottled S. paraguensis will also prove to grade into the present form. Baby specimens of minensis, chapadce, and paraguensis are as readily distinguishable from each other as are the adults. 28. TAYASSU ALBIROSTRIS 111. 2 . 1144, with two foetuses 1145 and 1146. 29. TAYASSU TAJACU L. 6. H20, 1126, 1169. $. 1074. 30. MAZAMA RUFA F. CUV. 6. 1095. Yg. d. 1044. 31. MYRMECOPHAGA TRIDACTYLA Linn. <J. 1128, 1180. 2. 1151, 1179. The reasons for using the above name are given in ' American Naturalist,' xxxv. p. 143 (1901). 32. TAMANDUA TETRADACTYLA Linn. <$. 1038, 1103, 1106, 1112, 1125, 1149. 2. 1017, 1058, 1084, 1181. 33. DASYPUS GILVIPES Licht. Tatou poyou Azara, Quadr. Paraguay, ii. p. 142 (1801). Dasypus gilvipes 111. Abh. Ak. Berl. 1811, p. 108 (pub. 1815) (nomen nudum). Dasypus gilvipes Licht. Abh. Ak. Berl. 1815, p. 215 (pub. 1818). Dasypus encoubert Desm. Mamm. ii. p. 370 (1822). S. 1138, 1166, 1199. 2. 1072. Under the name of Dasypus sexcinctus L. both the North and South Brazilian forms of this group have commonly been confounded, but since they differ conspicuously in size and are clearly different, it is necessary to consider which species should bear Linnasus's name. Acting on the general principle that the first reference to Linnaaus's own works should be taken as a guide in identifying his species, we get in this case a reference to the " Mus. Ad. Fr." (p. 7), and the specimen mentioned in that work would be the type. That specimen is still in the Stockholm Museum, and Prof. F. A. Smitt has been kind enough to inform m e that its cephalic shield is 77 m m . in length, This corresponds closely with the * Ann. Mag. N. H. (7) viii. p. 535. |