156 NOVITATES ZOOLOGICAE XXI. 1914. 



been noted — viz. the white forehead of albonotata, and the absence of any bnff or 

 sandy colour below the black lateral band in this animal. 



The eastern race of Gazella rufifrons was named " Anfilcpt' \_Ga:flln~\ 

 laevipes a" by Snndevall.t Even if the anthor inclnded more than this race nnder 

 the name mentioned, it is evident that the form whicli he principally had in his 

 mind when he gave the name was the one which he marked with the letter "a," 

 and of which he kept specimens in his own mnseiim. These latter specimens, male 

 and female, also received particnlar mention. They still exist in the Natural 

 History Museum in Stockholm, and evidently must be regarded as type-specimens 

 for the specific name " laeri/jes." According to modern nomenclature the name of 

 this Gazelle ought to be : 



Gazella rufifrons laevipes Sundevall. 



It must, however, be observed that, in spite of the name, and although 

 Snndevall in the diagnosis {I.e. p. 266) says : " Scopis carpi nullis," the type- 

 specimens are provided with knee-tufts. These are, however, not so thick and not 

 so well defined as in other Gazelles, and have therefore been overlooked, although 

 there really is a brush of long, thickly set hairs at the usual place. These laeeljies 

 specimens dift'er from (t. albonotata in colour in the following jioints. There is no 

 black in the central facial band nor in the lateral facial band, nor is there any white 

 on the forehead. The bnff colour can be seen all along the sides of the body below 

 the dark lateral band. 



There are also several differences in the skulls. In lai'eipes the premaxillaries 

 are less develoi>ed — so much so that they do not reach the nasals at all — whereas 

 these bones in G. albonotata form a long suture with each other (abont 2 cm. in 

 the female, but not qnite so much in the male). The relative weakness of the 

 premaxillaries of G. r. laempes is also manifested by their narrowness in front 

 (cf. below). As the following measurements show, the skull of toer/yu^^s- is smaller 

 than that of albonotata,. 



Siindevall's type skulls of 

 " Antilope laevipes." 



Greatest length of skull 



Occiput to tip of nasal ...... 



Orbit to gnathion ....... 



Greatest breadth of skull ...... 



Length of upper molar series ..... 



Least interorbital width ...... 



Breadth across vr (outside) ..... 



Breadth of jiahite between anterior lobes of »i^ . 

 Distance between first upper premolars 

 Breadth across anterior end of premaxillaries 

 Length of lower molar series ..... 



These measurements, when compared with those above, prove that G. albo- 

 notata has iu most dimensions a larger skull than G. r. laevipes. The former has 

 also a heavier lower jaw and larger molars than the latter. The transverse breadth 



t A'. Velniskapsakad. Uiiitdlinijar Iqt M^ia. Stockholm. 18-17, pp. 2B6, -67. 



