1 903.] OF THE PERCY SLADEN EXPEDITION. 241 



breadth across postorbital projections 46 ; greatest height from 

 palate 45 ; palate length 42 ; diastema 26-2 ; palatal foramina 

 5'4x4'2 ; 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 

 skuU-differences between hrandti and the less swollen headed 

 animal are too great to be due to individual variation. That 

 G. centralis is not the true C. prehensilis is shown by its diffei'ences 

 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. 

 J. 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, D. 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. 

 $. 1067, 1073. 



27. Sylvilagus minensis chapada, subsp. n. 



S. 1059, 1076, 1107, 1119, 1121, 1122, 1123, 1168, 1206. 



?. 1042, 1066, 1153, 1165, 1173. 



Closely similar in all characters to the true aS'. minensis of 

 Southern Minas Geraes, but the colour tlxroughout perceptibly 

 lighter. The back, which has the even lining of S. minensis and 

 not the coarse mottHng 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. ISTape- 

 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. 'ininensis 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 hrasiliensis being, as shown in 



Proc. Zool. Soc— 1903, Vol. II. No. XVI. 16 



