4 ARKIV FÖR ZOOLOGI. BAND 3. N:0 3. 



decidedly more shorthaired especially on the legs than O. 

 af er and O. cethiopicus. About O. wertheri Matschie says: 

 »Behaarung iiberall kurz nur an der Hinterseite der Beine 

 läng». 



In O. afer is the innermost (second) digit of the före feet 

 somewhat shorter than the next (third). This is also the case 

 in O. ivertheri about which Matschie vvrites >>digito anticQ 

 secundo^ rehquis longiore». In O. cethiopicus the innermost 

 digit is somewhat the longest. The proportions of these two 

 digits in O erikssoni are seen on the photo. They seem to 

 be subequal or the third finger somewhat longer. 



The dimensions of the Orycteropus erikssoni appear to 

 be decidedly greater than those of any of the hitherto known 

 races except perhaps O. afer and wertheri which may be al- 

 most equal. The specimen received measured in flesh about 

 2 m. from snout to tip of tail. It is a fullgrown male. The 

 legs are very stout. 



The tail appears to be a little less than ^j-a of the total 

 length, or 'Vt of the length of head and body. The relation 

 between the length of the tail and that of head and body 

 cannot be given quite exact, but it appears to be, according 

 to the photo reproduced here, approximately as 1 : 2,2 or 

 1 : 2,3. This is nearly the same relation as in O. senegalensis 

 according to Matschie, while the same relation in O haus- 

 sanus according to the same authority is put to 1:2,77 (1. 

 c. p. 103). According to the measurements communicated 

 by W. L. ScLATER (1. c), the relation between the length of 

 the tail and that of head and body of O. afer is about 1 : 2,7 

 in a female and 1 : 2,3 in a male specimen. Other authors 

 have quoted measurements, according to which, at least in 

 some cases, the tail of O. afer should sometimes attain even 

 more than half the length of head and body. In O. cethio- 

 picus Sunde VALL himself calculates the tail to be half as- 

 long as head and body. 



O. ivertheri appears to be very long-tailed as the tail at- 

 tains almost V;^ of the length of head and body. The 

 relation between the length of the tail and that of head and 

 body may be put to about 1:1,7 according to the measure- 

 ments in the original description. Compared with the others, 



^ In reality third but the first is missing. 



