246 Mr. O. Thomas on 



the long and very thin basal portion is dull whitlsli. Wool* 

 hairs with inconspicuous bhick tips, below which they are 

 ivholly rufous * to their bases. Tiiis is the case all over the 

 body, above and below, except just on the cheeks, where 

 the hairs are slaty based as usual. Under surface only 

 differing by the longer hairs being broadly whitish terminally, 

 without black tips. Tail deep rufous, the hairs at the end 

 tipped with blackish. 



iSkull markedly smaller and narrower in the interorbital 

 region than in true crassicaudatus , both interorbital and inter- 

 temporal dimensions decidedly less than in the other forms. 

 Antero-external zygomatic projections much less developed 

 than in 0. c. nyikce. Palatal foramina narrower than ia 

 the latter, palatal bridge equally small. Bullae larger than 

 in true crassicaudatus. 



Dimensions of the type, stated to have been taken in the 

 flesh :— 



Head and body 365 millim.; tail with hairs 93 ; hind foot 

 (s. u.) 78 ; ear 72. 



Skull : greatest length 81 ; basilar length 63 ; zygomatic 

 breadth 39; nasals 40 x 16 ; interorbital breadth 13*2 ; inter- 

 temporal breadth 11*8; diastema 26'5; palatal foramina 

 25 X I'd ; palatal bridge 7. 



Hah. Boshof, Orange River Colony. 



Tyi^e. Female. B.M. no. 97. 6. 6. 1. Collected and pre- 

 sented by Mr. A. W. Curry. One specimen. 



This striking animal is no doubt the high veldt repre- 

 sentative of tiie crassicaudatus group. Intermediate in 

 geographical position, it is more distinct from either of the 

 other two forms than thev are from each other. 



XXXV. — New Forms of Saimiri, Oryzomys, Phyllotis, 

 Coendou, and Cyclopes. By Oldfield 'J'homas. 



Saimiri holiviensis nigriceps, subsp. n. 



General colour of the true S. holiviensis (better but erro- 

 neously known as S. entomophagus^)^ but with the crown of 



* Bet-ween " vinaceous-cinnamon " and " cinnamon-rufous." 



t CalUthrix holiviensis, Is. GeoSi'. & Blainv. N. Ann. Mus. iii. p. 89 

 (1834). 



Calitrixetitomophagus, d'Orbigny, "\ oy. Am. M^rid., Atlas Mamm. pi. iv. 

 (183G). 



Sainiiris eiitomvphaijus, d'Orb. op. cit. Texte; p. 10 (lSi7). 



