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Show 231 MR. OLDFIELD THOMAS ON THE MAMMALS [Nov. 3, Cuyaba is on the river level, and the country towards Chapada is all at the same low altitude until the abrupt rise of the plateau edge is reached, comparatively close to Santa Anna. Mr. Robert has discovered a considerable number of new and interesting species, of which the most notable is the Wild Dog (PI. XXVII.), which I have named in honour of the late Mr. Percy Sladen. 1. CEBUS AZAR^E Rengg. 6. 1022, 1041, 1083, 1085, 1093, 1188, 1143, 1171, 1174, 1196, 1197, 1198, 1208. $. 1045, 1082, 1086, 1094, 1104, 1105, 1152, 1175, 1176. In the absence of any certainty that Spix's name Cebus libidi-nosus (type locality, Rio San Francisco) really belongs to this monkey, I use that of Rengger, which antedates Geoffroy's C. elegans by many years. This fine series emphasizes the difficulty of working out members of the present genus, for there is considerable variation both in the general colour, in the relative distribution of black and yellow on the head, and in the length and development of the temporal tufts. 2. AOTUS AZAR.E Humb. Nyctipithecus azarce auct. $.1150. 28 September, 1902. 3. CALLITHRIX * MELANURA Geoff. rf. 1130. ?. 1132. 4. HISTIOTUS VELATUS Geoff. ?. 1186. 5. MICRONYCTERIS MEGALOTIS Gray 5. 1014, 1015. 6. HEMIDERMA PERSPICILLATUM Linn. eT. 1063. $. 1012, 1013. ' 7. LONCHOGLOSSA CAUDIFERA Geoff. J. 1000, 1001, 1002. 9. 999, 1111. 8. ARTIBEUS PLANIROSTRIS Spix. tJ. 1089. * For the use of Callithrix instead of Hapale, see Ann. Mag. X, H. (7) xii. p. 455 (1903). |