52 



EiNAE Lönnberg, 



The thyroid cartilage of the larynx is anteriorly emarginate and 

 measures in the median line 14. at the side 16 mm. The greatest 

 width of each lateral shield is about 14 mm. Prominentia laryngea is 

 comparatively large but rounded. It is situated at the posterior end 

 of the cartilage. The cricoid cartilage forms anteriorly or ventrally a 

 rounded but rather stout arch. Its posterior or dorsal shield mea- 

 sures about 9 mm. in length. It has a short crista anteriorly and is 

 comparatively thick even at its posterior end. The epiglottis is trian- 

 gular with pointed apex. 



The lungs are divided by very deep fissures. The left lung 

 consists of three lobes. The large posterior lobe is perfectly lice from 

 the others and only by a little connective tissue connected with the 

 middle lobe. This is dorsiventrally very long, tonguelike and rather 

 narrow. Anteriorly it is. by a deep fissure, divided from the upper or 

 anterior lobe. The right lung shows four well defined, almost entirely 

 separated lobes and an azygous lobe. The spleen of the Nilgai-foetus 

 (fig. 15) has an elongated triangular shape which reminds one of 

 that in the Black-buck, but is somewhat different from the shortly 

 triangular ovine type and still more from the oval (primitive) cervine 

 (including Giraffa and Ocibos) and the elongate taurine (also shared 

 by Gonnochœles and Bubalis sp. foetus) type. It measures 55 mm. in 

 length by 27 mm. in breadth. 



All four divisions of the ventricle are well developed, although 

 of course the abomasus is dominating in size. A dorsal and ventral 

 sack of the paunch is interiorly already differentiated by the develop- 

 ment of the large longitudinal fold (»Längspfeiler»). Both sacks are 

 subequal in size. The interior folds corresponding to the sulci coronarii 

 of the two main divisions are also developed and indicate that each 

 is provided with a Saccus ccecus. The reticular structure of the reti- 

 culum is also developed. In the present stage it is a good deal larger 

 than the psalterium which latter has developed four systems of folds. 

 It is thus quadriplicate, but according to Gareod 1 ) the same organ of 

 the adult Nilgai is quinqueplicate. The abomasus is provided with a 

 huge number of folds. The exact number cannot, however, be indi- 

 cated because they are irregularly arranged. The largest folds are 

 more or less distinctly longitudinal, but there are also a good many 

 oblique or transversal folds. From the pylorus the duodenum runs to 



J ) P. Z. S. 1877. 



