443 E.vternal Characters of Iitn)iiuatkt\A'tNdcl*ACtffkl'K 



with ajrc in an interesting manner. Tlius'inucalf -one! <ilaif 

 old it is -wider than in the adnlt, being al)ont iltUnoc-jivuLrAUjs, 

 tlie widtli of the internarial septnm, uhcrcas in a icrtus 

 about three months (leveh)pe(l the naked area beneath the 

 nostrils is very broad, broader even than in the jubdt 

 Bose/aphus, giving tlie ihinarium a strictly bovine appear- 

 ance. This suggests that the bovine type of rhinaiiuu^ is 

 the primitive type iu the Rnminantia ^. /'^ ) 



As I recoided iji 1910, iiii/u'inul yt(ntd^~tiM^4)iter(lii/HaI ^ 

 ])((lal glands are absent, but the hind feet' possess glandular 

 thickenings of the skin surmounted by a fringe of bUiek 

 hairs (fig. 3, A, C) precisely as in Strepsiceros. 



'V\\e penis (fig. 2, D, E) of an old male has an elongated, 

 undulating, attenuated terminal portion, much longer than 

 in Bosclaphus, and, as in that genus and others belonging to 

 the Tragelaphiuie in Mhich this organ has been described, 

 the urethral canal is not produced beyond the tip of the 

 glans. 



The points of interest connected Avith the characters 

 above enumerated may be sun)marized as follows : — 



(1) Preorbital gland iiresont Tetraceros, Bvselaplnis. 



„ „ abseut Traijclaphus (Liiinio- 



triions), Xt/alu, fl/rcj.- 

 sicero.i, Taurotrityvs. 



(2) Inguinal glands present Trarjelujihus {Linnn,- 



trtif/iis), tilrepsiccms 

 (h'alwavsinlbelattei). 



„ ,, absent Tetraceros, Uosetaj him, 



Tdurotrayus. 



(3) Glands between posterior false liool's absent. Triu/eldphus {Livnic- 



trui/us). 

 „ „ „ present. 



Consisting of definite pockets witbin 



false hoofs Tetraceros. 



Consisting of a thickening of the skin 

 only. 

 Tljickened skin extending across fet- 

 lock Hvtelapha,". 



Thickened sldn restricted to area close 

 Id false hooi's and surmounted by 



fringe of hairs Ntjala, Strejisucros, 



Taurotra<ji'8. 



* It may be added that in the foetal sjecimeu above alludtd to tlie 

 facial vibrissas Avere well developed, consisting of shoit scattered 

 niystacials and submentals, a row of superciliaries and suboculars, an 

 upper and a lower penal tuft arising from the wljile spots on the cheek 

 and interramals. It is singular that the Artiodactyla and the Carnivora 

 are tlse only orders of mammals known to me wliicli possess as a primi- 

 tive character two geuai tufts— an upper and a lower — on each cheek. 



