KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 49. N:0 7. 11 



The abomasus has about 7 — 8 large folds and some smaller folds between. 

 Especially in the posterior portion these folds are strongly undulated. The plicated 

 tract of the abomasus is comparatively long measuring about 9 cm., but even the 

 remaining about 2 1 2 cm. of the organ are not devoid of plica?, and there are also 

 some transversally arranged ones. The abomasus of this species is thus well provided 

 with folds. 



The spleen is oval 65 X 48 mm. It is quite thin at the free edge, but thick 

 towards the attached side. In this respect, although not in shape, it resembles the 

 same organ of Cephalophus melanorheus as figured by the present author. 1 



The liver is divided in two main lobes the right of which is considerably larger, 

 78 X 66 mm. while the left measures 76 X 45 mm. The Spigelian lobe is rounded, but 

 not prominent. Lobus quadratus is three-sided, somewhat curved and sickle-shaped. 

 It caps the kidney. 



It is an interesting fact that the gallbladder is very small almost rudimentary 

 in the specimens examined. In this respect RhyncJwtragus approaches the genus 

 Cephalophus among the Antelopes in which the gall-bladder is missing. Some years 

 ago Beddard described the anatomy of Madoqua phillipsi, 2 but he does not mention 

 anything about the liver and gall-bladder so that it is thus uncertain whether Ma- 

 doqua in this respect differs from RhyncJwtragus or not. 



The duodenal loop is quite short only measuring 3 cm. The length of the 

 small intestine is about 360 cm. 



The ccecum is long, measuring about 14 cm., and it is wider towards the blind 

 end. The entire length of the large intestine (not counting the csecum) is about 

 145 cm. 



After a short but broad ansa proximalis the colon enters the spiral. The latter 

 is different in the two specimens examined. In one which may be regarded as normal 

 there is 1 Va centripetal and two centrif ugal coils so that the arrangement is similar 

 to the diagram of Cephalophus maxivelli communicated by Beddard. 3 In the other 

 specimen the end of the colic loop, representing the last half centripetal and the first 

 half centrifugal coil, has not the regular situation but is so to say bent backwards 

 to the caecal side and has become attached to the mesentery between the recurrent 

 limb of the first centripetal coil and the second centripetal coil. This is, however, 

 most probably an individual anomaly. 



Beddard has pointed out (1. c. p. 182—184) that the colic spirals of the Ru- 

 minants may be referred to two different types. In one of these the centripetal and 

 centrifugal coils are equal in number, and the limb of the spiral which forms the 

 csecal side of the terminal portion is the centripetal spiral. In the other the centri- 

 fugal spiral is half a coil longer, and the limb of the spiral which forms the caecal 

 side of the terminal portion is the outgoing spiral. With other words in the first 

 case the last centripetal half coil is bent back upon the preceding centripetal half- 



1 Nov. Acta Reg. Soc. Se. Upsala 1903. Pl. I, fig. 6. 



2 Proc. Zool. Soc. London 1909, p. 188 and following. 

 :i 1. c. p. 183. 



