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PROCEEDINGS OF THE 



the removal of the liver ; but so far as could be made out, the con- 

 ditions are as follows : — 



The central tendon of the diaphragm displays a pouch-like dilation 

 (fig. 1, i), Avide below, and extending upwards above the level of that 

 partition, and in front of (ventral) to the posterior vena cava. With 

 this pouch, which presumably received the contents of the hepatic 

 veins, the accessory organ was continuous superiorly by an orifice more 

 or less circular in form, and having a diameter of about 10 mm. The 

 position of this aperture is indicated in fig. 1 by an upward extension 

 of the dotted line leading from the letter i. Opening into the back 



Fig. 2. — a, trachea ; h, aorta ; c, right auricle ; d, right ventricle ; e, apex of 

 left ventricle ; /, vestigial remains of left oniphalo-meseraic vein ; g, post 

 vena cava ; h, anomalous organ (liver) ; i, post vena cava ; j, left auricle ; 

 k, thoracic aorta ; I, right pulmonary veins ; m, right pulmonary artery. 



of this sinus-like dilatation {i, fig. 1), and below the diaphragm, is an 

 oval orifice, 10 mm. in lengtli, leading into the posterior vena cava. 

 How the sinus i was closed in anteriorly and inferiorly can unfortu- 

 nately not be determined. In addition to its connection with the 

 fibrous pouch-like extension of the tendon of the diaphragm, the 

 anomalous organ was also united with the anterior (ventral) surface 

 of the posterior vena cava, above the diaphragm, by means of a taper- 

 ing triangular meso-cardial fold, between the layers of which there was 

 some fat (see fig. 2, to the left of the posterior vena cava), 



