38 



MORPHOLOGY OF THE 



shows the relation of the stomach to the liver, will facilitate 

 the understanding of these relations. The third portion of 

 the duodenum rested upon the lower border of the caudate 

 lobe, as in the 17| mm. embryo. 



Fig. 23 represents the caudal surface of the liver of an 

 embryo 111 mm. The appearance of this liver is quite differ- 

 ent from the two preceding ones. The caudate and Spige- 

 lian lobes are not as prominent; the fossa occupied by the 

 fundus of the stomach is much less pronounced, the groove 

 for the oesophagus is better developed, and, in two words, 



Fig 23. 



Caudal surface of the liver of an embryo eat 111 uim. (Enlarged 2.6 diame- 

 ters.) d., duodenal groove, r. c, right eeutrallobe. c, caudate lobe. A'., kidney 

 impression, r. right lateral lobe. I. L, left lateral lobe. /., groove for fundus, 

 r., apex of Spigelian lobe, r., iDortal vein. v. a., groove for the vertical arm 

 of the lesser curvature of the stomach, ce., oesophageal groove. ;S'., Spigelian 

 lobe, i)., groove for pylorus. 



this liver reminds one of the adult quite as much as of the 

 embryo. In this embryo the hair was beginning to appear 

 on the surface of the body, the ascending colon was j^erf ectly 

 formed, the third portion of the duodenum was some distance 

 below the caudate lobe (possibly rather less than one half of 

 its second portion rested upon it), and lastly, the Spigelian 

 lobe extended a very short distance behind the stomach as 



