26 



ElNAE LÖNNBEEG, 



of teats was derived from a greater through reduction than the con- 

 trary. But on the other hand it is known that at least in the dome- 

 sticated cow the regular number of four teats may be increased to six. 



Concerning the situation of the abdominal viscera it may be 

 remarked that it has undergone a considerable change from the one 

 found in the foetus of the stage described previously under the mark a. 



The liver is not by far so large, comparatively speaking. The 

 l ight lobe lies longitudinally close to the abdominal wall. The greater 

 part of the left lobe is situated to the left of the median line, but it 

 leaves not only the whole paunch uncovered, but also a great deal 

 of the reticulum and a portion of the abomasus. Behind the ventricle 

 are seen convolutions of the small intestine, but the colic spiral coils 

 are now entirely concealed, the intestinal mass having rotated towards 

 the left so that the colic coils have in this stage been turned inwards 

 from the former situation at the left wall of the abdominal cavity 

 which it occupied in stage a., towards the dorsal portion of the same. 

 The coils thus lie now in a horizontal plane instead of in a vertical 

 one as before. The left kidney has the same situation as before, but 

 the testicle has wandered backwards to the inguinal region. On the 

 right side the liver occupies a greater area and extends more than 

 half way to the pelvis. Dorsally and behind the liver the kidney is 

 found partly surrounded by the former organ. The testicle has changed 

 place as on the left side. Behind the kidney is therefore a coil of 

 the rectum to be seen between it and the testicle. In a medio-ventral 

 direction from these organs the caecum is found and then the numerous 

 convolutions of the small intestine. 



If the different organs of this stage are compared with those 

 of the foregoing the following facts may be discerned. The paunch 

 has increased considerably in size. Its longest longitudinal diameter 

 measures about 17 1 2 mm. thus nearly three times as much as in the 

 stage (/. while the body-measurements of the stage b. are not quite 

 twice as great as those of the stage a. The sacci cœci are not so 

 rounded as in the foregoing stage, but more broadly extended, the 

 ventral one, however, being narrowed at the posterior end. The 

 reticulum has increased proportionally to the growth of the body as 

 its longest diameter is about 10 mm. The psalterium has almost done 

 the same, its longest diameter being about 6 mm. The reticular 

 structure of the inner surface of the reticulum is fully developed. The 

 folds of the psalterium are also developed. In the abomasus some 



