12 ARKIV FÖR ZOOLOGI, BAND 5. NIO 10. 



The psalterium is provided with about 11 — 12 longitudi- 

 nal folds and betwen them in the inferior portion of the 

 psalterium there are lower cross folds some of which at least 

 make the impression of being permanent even if they by 

 stretching become almost obsolete. 



A comparison with the corresponding organs of Ehaphi- 

 cerus campestris (also preserved by Dr. Trägårdh), gives the 

 following result. The length and breadth of the paunch 

 measured as above are almost equal, both being about 19 cm. 

 The reticvlum is smaller about 7V-2 by 6 cm. The papillae of 

 the paunch are tongue-like as in the Red Duiker but per- 

 haps a little coarser. The inner structure of the reticulum 

 is strikingjy different from that of the Red Duiker because 

 the »cells» are so very small. The majority of the cells have 

 a diameter of only 4 — 5 mm., although some few may mea- 

 sure up to 8 mm. across. This difference in structure of the 

 reticulum in these two species of Antelopes may be explained 

 in such a way that the secondary septa in the reticulum of 

 the Steenbok have grown up to perfectly the same height 

 as the primary. The reticulum of the Eaphicerus is also 

 provided with a denser armature of closely set conical papillse 

 than the same organ of CeplialopJms natalensis. 



The psalterium of the former is much smaller still than 

 the same organ of the latter as it measures only about SVa 

 cm. in length by 2 in thickness. It contains only 6 primary 

 folds and perhaps an indication of a 7th. The largest of 

 these folds measures about 13 or 14 mm. in height but in 

 the interspaces between these primary folds are slight but 

 rievertheiess quite perceptible traces of two or three low 

 folds and when these are 3 in number the middle one is a 

 little higher so that it may understood that these traces of 

 folds represent the rudiments of secondary as well as ter- 

 tiary folds. This is a clear proof that the organ as a whole 

 is reduced, but it is not rudimentary as the comparatively 

 large primary folds with their strong armature of conical 

 often a little recurved papillse indicate. 



The abomasus of Ehaphicerus has about a dozen longi- 

 tudinal folds. The liver of Cephalophus ogilhyi from Came- 

 roon and C. natalensis from the Zululand are very much alike 

 and both agree in the absence of a gallbladder. There are 



