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Show 1903.] OF THE PERCY SLADEN EXPEDITION. 241 breadth across postorbital projections 46 ; greatest height palate 45; palate length 42; diastema 26-2; palatal foramina o-4 x 4-2 ; length of upper molar series 19*6. Type. No. 1147 as above. Killed 22 September, 1902. It seems curious that two Porcupines of the prehensilis group should occur at Chapada, but, as pointed out by Dr. Jentink, the skull-differences between brandti and the less swollen headed animal are too great to be due to individual variation. That C. centralis is not the true C. prehensilis is shown by its differences from a specimen obtained in Sao Paulo, this latter locality being far closer to the region whence Marcgrave described his "Cuandu," the original prototype of Linnseus's C. prehensilis. 25. DASYPROCTA AZAR.E Licht. d. 1209. I can find no tangible difference between examples of this wide-ranging form from Chapada, from Paraguay, and from Sao Paulo. But in each locality the specimens differ considerably in colour inter se. 1 may take this opportunity to point out how very different from all other Agoutis the long-tailed form, B. acouchy, is, and to suggest that it ought to form a special genus. This might be called Myoprocta ; and its main distinguishing characters would be the well-developed tail and conspicuously smaller teeth. 26. AGOUTI PACA L. 2. 1067, 1073. 27. SYLVILAGUS MINENSIS CHAPAD^E, subsp. n. J. 1059, 1076, 1107, 1119, 1121, 1122, 1123, 1168, 1206. 2. 1042, 1066, 1153, 1165, 1173. Closely similar in all characters to the true S. minensis of Southern Minas Geraes, but the colour throughout perceptibly lighter. The back, which has the even lining of S. minensis and not the coarse mottling of S. paraguensis, is several shades lighter in tone, the sides and rump are a light greyish, and the cheeks are less blackened. Terminal half of ear a lighter brown. Nape-patch nearer " ochraceous buff," though duller, while that of minensis approaches " tawny " or " tawny ochraceous." In other respects, in size, proportions, length of ears, and characters of skull, I can find no difference between the Chapada Hare and the typical S. minensis obtained by Mr. Robert on the Rio Jordao. Dimensions of the type, measured in the flesh:- Head and body 355 mm.: hind foot (s. u.) 76 ; ear-opening 60. Skull-greatest length 74 mm.; basilar length 59. Type. Female. B.M. No. 3.7.7.116. Original number 1066. Collected 4 August, 1902. This is evidently a pale form of the Hare which is found over most of Southern Brazil, the true brasiliensis being, as shown in PROC. ZOOL. Soc-1903, VOL. II. No. XVI. 16 |