Material for the Study of Ruminants. 



31 



Along the anteorbital gland there is a shallow groove in the 

 skin about 15 mm. in length and in this groove there is a series of 

 23 rather large pores in a nearly straight row and on either side, 

 upper and lower, of each of these there is also a pore, although much 

 smaller and less conspicuous. These ducts represent the openings of 

 the anteorbital gland which is somewhat pigmented and surrounded 

 by a fibromuscular layer as usual. 



The upper lip has a vertical groove which is continued into the 

 mouth where it separates to form a circular groove round the papilla 

 incisiva. This latter is ovoid in shape with the narrow end directed 

 forward. A lateral groove branches of towards each side from the 

 nasal groove before this has reached the papilla. This is thus a differ- 

 ent condition from that prevailing in the Madoqua. The palatal ridges 

 are about ten in number, of which the three or four foremost ones 

 are much more prominent than the others, but the posterior ones are 

 more distinctly crenulated. There is no caruncula sublingualis only a 

 straight fold. 



The papillœ filiformes of the tongue are scale-like, not pointed. 

 On the posterior back of the tongue they partly form flat warts, partly 

 broad scales, and there are no conical or curved ones. In the anterior 

 half of the tongue the papillary covering extends a good deal over 

 the lower surface, but is there quite similar to that of the upper surface. 

 The papillœ fungiformes are evenly scattered over the tongue with the 

 exception of the median portion of the posterior half. 



The papillœ circumvallatœ are arranged in two series with 5 — 6 

 in the inner and 3 — 4 in the outer row of either side. This is a re- 

 markable difference from »Antilope» (Ceplialoplms) mergens which ac- 

 cording to Brücher as quoted by Oppel 1 ) is said to have 18 — 20 small 

 papillœ circumvallatœ an either side. But it may have been difficult to 

 see the difference between such papillae and p. fungiformes. 



The glandula tkyreoidea is a flattened bean-shaped body situated 

 on each side of the trachea just behind the larynx near its dorsal sur- 

 face. There is no isthmus and the dimensions are about 6x4x2 mm. 



The thymus-gland is formed by two elongate bodies situated 

 just in front of the first pair of ribs and with their posterior fused 

 portion entering the thoracic cavity. The length of the whole gland 

 is about 27 mm. and the separate anterior ends measure about 11 



*) Mundhöhle, Bauchspeicheldrüse und Leber, Jena 1900. 



