Mateeial for the Study of Ruminants. 



35 



mi either side. All of t hem arc crenulated but the eight posterior 

 more so than the foremost ones. 



The glandula ihyreoidea is a good deal larger than in the fore- 

 going and measures 10 — 11 mm. in length by 6 — 5 in breadth. There 

 is no trace of an isthmus. 



In a similar way the thymusgland is larger and better developed 

 than in the foregoing. Its length is about 50 mm. and the paired an- 

 terior ends reach on either side all the way up to the larynx. This 

 organ thus continues its development, at least during the whole foe- 

 tal time. 



The lungs are very deeply cleft so that the right lung has six 

 and the azvgous lobe, the left three lobes. The lobes of the right 

 lung is formed in such a way that lobus apicalis is fully divided into 

 two anterior and a posterior lobe which latter also has a rather deep 

 fissure in its anterior margin. Lobus cardiacus forms two lobes, a 

 dorsal and a ventral, but lobus diaphragmaticus is entire. 



The liver is like that of the foregoing specimen. The caudate 

 lobe is trihedral and very large and massive. The Spigelian lobe is 

 very short and rounded, hardly developed. ■ The Spigelian lobe seems 

 thus, as is already stated above, to be subjected to great variation. The 

 greatest transversal length of the entire organ is about 48 mm. and 

 its greatest breadth about 32 mm. This is about half the size of the 

 same organ in the adult. Its situation is somewhat oblique, it is not 

 quite transversal, but on the other hand not quite longitudinal as in 

 some antelopes. 



The distance from the cardia to the end of the ventridextral 

 sack of the paunch is about 34 mm. Sulci coronarii may be seen as 

 well on the left as on the right sack, but much better developed on 

 the latter, as is also the case in the adult, and its saccus cœcus is 

 broad and well defined while it is small and less defined on the left 

 sack. Compared with the earlier stages, for instance b. it seems as 

 if the ventridextral sack should have grown more than the other. 

 The whole paunch seems also somewhat broader compared with its 

 length than in the earlier stages. The longest diameter of the reti- 

 culum is about 20 mm. This organ, as well as the paunch, is thus 

 about twice as large as in stage b. The exact measurement of the 

 psalterium is a little difficult to ascertain, but it seems to be about 11 

 mm. and it has then grown rather less than the paunch and the re- 

 ticulum. The abomasus is, however, the portion of the ventricle that has 



