214 ON STREPSICEROS KUDU 



mous variation in general form of the horns and at the 

 same time show the variation due to age. 



The measurements of the horns figured on plate 9 are 

 the following (in Centimeters): 



Length Distance Proportion 

 I. (Cat. Ost. 1887, p. 140) 



9' ■» n n 7) V 



"" » V r> V V 



'^•7) 55 » V n 



C' » 7) T) » » 



The most developed horn of the Koodoo presents two 

 arches on both sides of the horn, therefore the figure 

 given by Sclater (P. Z. S. L. 1884) and those on plate 9, 

 figs, g and k , represent horns of very adult specimens ; the 

 horns figured by Smith, Blyth (P. Z. S. L. 1869, fig. 1) 

 and on plate 9 , c, represent a younger stadium , meanwhile 

 the figures by Blyth (1. c. fig. 2) and on plate 9 , / and 

 n, represent half grown horns. From the named figures it 

 will be clear to understand how the proportion between 

 the length of the horns and the distance of their points 

 must vary with the different age of the same individual, 

 and alternately must increase and decrease according to age. 



If we carefully study the figures on plate 9 we recognize 

 as it were three different types , one represented by k 

 slender and elegant, one represented by c very broadly 

 developed horns of a very great size , and finally the form 

 represented by g somewhat intermediate between k and c, 

 longer but less slender than k^ not so strongly developed 

 but more elegant than c ; I shows the halfgrown stadium 

 of g and n the halfgrown stadium of c. 



The Lesser Koodoo {Str. imherbis) resembles a miniature 

 specimen of stadium k if we look at the horns, and there- 

 fore its horns never can be confounded with those of 

 Koodoos of the types c , (j nor k , being slender and elegant 

 like ^, but always the very small size — nay if adult — 

 gives the finishing stroke; moreover the imherhis-hom^ 

 never show the open spiral so constant in the kudu^ as 



Notes from tlae Leyden üMuseura , Vol. XII. 



