Mateeial foe the Study or Ruminants. 



IT 



On the intestinal canal of Cephalophus ogilbyi and C. melanorhoeus. 



From my friend, Mr. G. Linnell I have had the pleasure of 

 receiving some viscera of the antelopes mentioned above, sent home 

 from the Cameroons, West-Africa. 



The ventricle of Cephalophus melanorhoeus, »isello» of the native 

 hunters, preserved in formaline shows the four usual portions of a 

 ruminant stomach but very differently developed. The paunch (fig. 5 

 Pl. I) is divided in the usual dorsi-sinistral and ventri-dextral sacks, but 

 both are rather shorter and more broadly roundish in a transversal 

 direction than is usually the case. This may also be seen from the 

 measurements. The dorsi-sinistral, which as usual is the shorter, has 

 a longitudinal axis measuring (from the cardia) about 135 mm. in length 

 and that of the ventridextral is about 170 mm. The breadth measured 

 from the well developed sulcus longitudinales dexter is in the former 

 about 83 mm. in the latter about 97 mm. On the right (median) side 

 sulci coronarii are not visible, on the left the sulcus coronarius of the 

 ventri-dextral sack is well developed and forms the limit of a short and 

 broad Saccus cœcus measuring about 5V2 cm. in depth. In the dorsi- 

 sinistral sack the saccus cœcus is not differentiated by any sulcus coro- 

 narius. Sulcus longitiiclinalis sinister is only developed at both ends as 

 continuations from the right side which do not meet. It may thus be 

 said that the external sulci of the paunch are only little developed. 



The reticulum (fig. 5 I r.) is almost ovate with the diameters 

 70 X 50 X 45 mm., the narrower end forming a blind sack towards 

 the abomasus protruding beyond the psalterium. 



The latter (fig. 5 Pl. I ps.) is very small and may be termed a 

 rudiment measuring 25 mm. in length and 15 in thickness. 



The abomasus (fig. 5 Pl. 1 ab.) measures along the middle of 

 its curvature about 85 mm. 



The interior surface of the paunch is densely beset with tongue- 

 like papillae which from a narrow basal stalk by and by broaden to 

 about 1 w 2 mm. or a little more at the rounded free end. Their length 

 varies, of course, at different places, but seems, as a rule, not to 

 exceed 3V2 mm. The cells of the reticulum have the usual appearance. 

 Their diameter is, as a r ule, 4 — 5 mm. and the walls are low, hardly 

 measuring more than .1 mm. (or less than that) in height. Secondary 

 septa are seen here and there. The folds of the psalterium seem at 



Nova Acta Reg. Soc. Sc. Ups. Ser. III. Impr. "Vt 1903. 3 



