20 



KrxAK Lönnberg, 



Especially striking is the simplicity of the psalterium which hardly 

 deserves to be termed duplicate. These features indicate a diet differ- 

 ing from that of the common grass-feeding ruminants. The paunch 

 of the Cephalophus ogilbyi which I have had at my disposition was 

 unfortunately emptied, but I found, however, in the same, several 

 rather large bean-like (although more or less angular) seeds of pretty 

 hard consistency, in addition to these were some lumps of a fruit-pulp 

 which once may have surrounded the seeds and some few pieces of 

 leaves. Smaller debris could be derived from one or the other of 

 these three constituents. It is thus evident that fruits and seeds play 

 important parts in the diet of this antelope. In such a case it is 

 evident that the paunch does not need to have such a great capacity 

 as if the food had been composed of grass, leaves and other stuff 

 chiefly consisting of cellulose. The few but with strong conical pa- 

 pillae beset folds of the psalterium seem to be very well adapted to 

 the grinding of the remasticated and by the saliva thoroughly moistened 

 pieces of seeds. 



The paunch of the smaller species G. melanorhoeus was filled 

 with large chunks of fruit pulp, some of which have the size of half a 

 walnut or more, large, more or less beanlike, seeds of several kinds, 

 probably partly belonging to the pieces of fruit pulp. In addition to 

 these some leaves were found which, however, were so few that 

 there is no danger in assuming that they have been swallowed with 

 the fruits mentioned above. From these facts may be concluded that 

 the »isello» is a more or less exclusively carpophagous animal, perhaps 

 and probably even more than G. ogilbyi. This may account for the 

 simple or little differentiated state of the paunch, the small and only 

 duplicate psalterium and the low folds of the abomasus. I think that it 

 might be assumed with a high degree of probability that Gephalophus 

 maxwelli in which Gareod and Boas found the psalterium in a ru- 

 dimentary s);ilc, as is mentioned above, owes this to a similar diet. 

 Compare also below the description of the foetus of these two species, 

 G. ogilbyi and melanorhoeus. 



In the development of the different parts of the intestine of these 

 two animals modifications may also be observed which correspond 

 with those of the ventricle as related above. 



The small intestine of Gephalophus ogilbyi has a length of about 

 HHiO cm. its connection with the peripheric colic coil of the large in- 

 testine is short, as a rule about 2 or 3 cm. The ileum enters into 



