KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 49. N:Q 7. 



27 



h 



gestible parts can be utilised. With its numerous folds which increase the working 

 surface and which at the same time are able to retard the passage of the food the 

 large intestine forms a kind of chemical laboratorv. 



The kidney of Phacochcerus has already by Gerhardt 1 

 been stated to resemble that of Sus and to have several 

 calyces and papillse. On a longitudinal section through the 

 left kidney of this specimen five independent papillse are 

 seen. The exteriör surface is smooth. 



The male organ of this specimen is thin and simple. 

 It does not show an\^ spiral twist at the end as in the do- 

 mestic Pig. The urethra projects only as a short papilla 

 beyond the other part of the penis. It is possible that this 

 organ is not as yet fully developed in such a young spe- 

 cimen, but on the other hand it must be remembered that 

 among the Antelopes the general structure of the penis is 

 already to be recognized in foetal specimens. It will thus 

 appear as if the penis of Phacochcerus had been subjected 

 to a certain reduction when compared with that of Sus. It 

 is of interest to find that such a reduction has taken place 

 in the most specialised member of the Suidce in an analog- 

 ous manner as the same organ has become simplified in 

 the most specialised members of the Bovidce. 



When Beddard some years ago 2 ga ve an account 

 about the azygos veins in mammals he also described the 

 condition of this vein found in Phacochcerus cethiopicus. 3 

 He found there »a long azygos vein on the left side. This 

 vein started, with an affluent from the intercostal space 

 between ribs 5 and 6.» In the present specimen as is shown 

 by the accompanying figure (Fig. 3) the first affluent comes 

 from the intercostal space between ribs 3 and 4. From the 

 next intercostal space no affluent was seen to come, so that 

 the second affluent comes from the intercostal space between 



7 



s 



9 



10 



11 



12 



13 



Fig. 3. Diagram showing azygos 

 vein of a young Phacochcerus 

 riks 5 and 6, and then from every following on the left side. from Brit. East Africa. Ao aorta, 



Opposite the intercostal space between ribs 9 and 10 an ^XTV^nS 



affluent is seen to come from the right side across the aorta of ribs. 



on its ventral side. 



1 Zur Morph. d. Säugetierniere, Verh. d. Deutsch. Zool. Ges. 1911, p. 265. 



2 Proc. Zool. Soc. London 1907. 



3 1. c. p. 189. 



