

KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 49. NIO 7. 17 



In the subfamily Cephalophinoe, the processus urethralis usually is of considerable 

 length extending a great deal beyond the tip of the penis as already Garrod stated 

 about Cephalophus maxivelli, and the present author about C. melanorheus (1903) and 

 C. natalensis (1909). 



In a specimen of C. (Sylvicapra) grimmia I found the processus urethralis to be 

 quite short. 1 Unless this specimen was anomalous the species mentioned is quite 

 unlike C. (S.) abyssinica hindei of which species I had the opportunity of obtaining 

 a specimen myself at Punda Melia, British East Africa. In the penis of the latter 

 the spiral twisting is very pronounced, the cushion well developed, and the processus 

 urethralis very long, thread-like and extending fully 16 mm. beyond tlie end of the 

 penis. The male organ of this Duiker exhibits thus a very primitive form. 



For the subfamily Neotragince I have only one additional statement to make 

 viz. concerning the little Suni Antelope (Nesotragus moschatus). Its male organ is 

 somewhat spirally twisted b ut, like the same organ of N. livingstonianus, it has no 

 urethral prolongation. 2 As Rhaphicerus, as well, does not have its urethra prolonged 

 beyond the tip of the penis this may be the usual condition in this subfamily, al- 

 though Garrod's description of Ourebia nigricaudata proves that in some cases the 

 reduction of the urethral prolongation is less complete. In all cases the organ is 

 slender, and the cushion is only little, or not at all developed. 



The shape of the penis of Kobus defassa and Redunca arundinum have been 

 described before (resp. 1903 and 1909). At this opportunity may be mentioned that 

 in Kobus ellipsiprymnus canescens this organ is very similar to the same of K. defassa. 3 

 It is entirely black pigmented. The cushion is strongly developed and bent down at 

 the tip. The urethra curves abruptly to the left and from below upwards. Processus 

 urethralis has a length of about 24 mm. 



The penis of Mpyceros melampus (subsp. rendilis) is very simple. It does not 

 taper gradually towards the tip but ends bluntly. In one specimen the tip is rounded 

 off, in the other a little more conical. The swelling, or cushion is only little developed 

 and not abruptly prominent. It is chiefly visible on the right side and there more 

 pronounced near the lower than the upper surface. The urethra is not turned över 

 to the left as usual but projects almost in the median line and bends there upwards. 

 The free portion which rather deserves the name papilla than processus urethralis is 

 only about 5 mm. in length (conf. Pl. 1, Fig. 7). 



In the Gerenuk (Lithocranius walleri) the penis is slender. The end which is 

 sparsely mottled with dark pigment is surrounded with a cushion which does not 

 rise abruptly över the surface of the organ but constitutes its blunt end. The urethra 

 is comparatively wide and appears to be quite straight, while the cushioned penis- 

 end itself is a little turned to the right and projects about 2 mm. beyond the trun- 

 cate end of the urethra (Pl. 1, Fig. 8). The latter is not attached to the penis all 

 the way to the orifice, but the last two millimeters are independent and form a kind 



1 Conf. 1. c. 1909. Pl. 3, Fig. 2. 



2 For a figure of the latter see Ark. f. Zoologi. Bd. 5. N:o 10. Pl. 4, Fig. 4. 



3 Conf. Lönnberg 1903 1. c. Pl. 1, Fig. 4. 



K. Sv. Vet. Akad. Handl. Band 49. N:o 7. 3 



