Matkim al for the Study of Ruminants. 



47 



about 4 1 2 and its thickness about 3 nun. In this species of Cepha- 

 lophus as well as in the others there is not the slightest trace of an 

 isthmus. In this respect Cephalophus shows a remarkable difference 

 from the condition found in Bos the calf of which has a well developed 

 isthmus. In Ovis »der Isthmus ist meist nicht mit Sicherheit nach- 

 zuweisen» 1 (. 



The left lung is divided in three lobes, and the right in five 

 lobes and the azygous, in such a way that the apical lobe is divided 

 in an anterior and a posterior and the lobus cardiacus in a dorsal 

 (smaller) and a ventral (larger) lobe, but lobus' diaphragmaticus is entire. 



Concerning the general arrangement of the abdominal viscera 

 may be remarked that the liver is very large and its right lobe has 

 an almost longitudinal position along the abdominal wall. It extends 

 so far back that it almost covers the whole right kidney from a ven- 

 tral view. Behind the right kidney is seen a transversal loop of the 

 rectum directed towards the right side. The middle and posterior- 

 portion of the left half of the abdominal cavity is occupied by the 

 coils of the intestine behind which a part of the left kidney protrudes. 

 To the left of the liver the greater part of the reticulum and the 

 paunch are visible and along the posterior margin of its left lobe pro- 

 jects a strip of the abomasus. 



Sulcus coronarius of the ventridextral sack is well developed, 

 less so on the dorsi-sinistral. The distance between cardia and the 

 posterior end of sacci cceci is- about 32 mm. The reticulum seems 

 large, almost semiglobular with a diameter of 1(3 — 17 mm. The psal- 

 terium is also quite large with a longitudinal diameter amounting to 

 about 13 mm. and a transversal of 9 mm. When compared with the 

 reticulum it appears to be considerably larger than in the correspon- 

 ding stages of the smaller species, which indicates that the psalterium 

 is for Cephalophus silvicultor a more important organ than for the smaller 

 species, no doubt depending upon differences in the diet. The ar- 

 rangement of the folds is, however, quite the same as in Cephalophus 

 ogilbyi, thus eight well developed primary folds beside some rudimen- 

 tary ones. Secondary folds are not developed; at least not in this 

 stage. The abomasus is large, measured along the curvature it is 

 about a fourth longer than the longest diameter of the paunch. Nine 

 broad folds are developed in its fundus region and in addition to those 



*) Ellenberger und Baum: Handbuch d. vergl. Anat. d. Hausthiere. Berlin 1900. 



