ANATOMY OF THE SONDAIC EHINOCEROS. 189 



were 22 inches by 15J inches. It was thickest towards its inferior border, near which 

 margin it measured from before backwards SJ inches. Within 5 inches of the superior 

 border it measured in the same direction 2 inches. It was separated from the left 

 central lobe by a very pronounced fissure, which extended upwards through the gland 

 ns far as the point where the upper third joined the middle third of the liver. The left 

 central lobe {L.C) was very distinctly marked oiF, and was conical at its free extremity; 

 it was convex in front, and of prismatic outline as regards its posterior surface ; its 

 measurements were respectively 18 inches and 5 inches, and its greatest thickness 

 IJ inch. The fissure that divided it from the right central lobe [B.C) extended 

 upwards in front as far as the suspensory ligament, and behind as far as the free 

 margin of the gastro-hepatic omentum. This lobe overlapped the left lateral by its 

 left margin, but was directly continuous with the right central across the line of the 

 suspensory ligament. The right central {B.C) and right lateral [R.L) lobes were but 

 faintly separated from one another, the intervening fissure separating only about the 

 inferior fourth of this part of the gland. Together they formed a lobe that was convex 

 upon both its surfaces, and that measured 22 inches in length, 9 inches in breadth, and 

 1^ inch at its thickest part. The base of this double lobe was separated from the 

 root of the left lateral segment by the gastro-hepatic omentum. The caudal lobe {Ca) 

 was separated from the rest of the liver by a fissure that extended upwards to within 

 2 inches of the superior margin of the gland. The lobe was 21 inches in length, 9 in 

 breadth, and If in thickness ; its extremity was pointed ; its anterior surface was convex, 

 its posterior marked by a median ridge that followed its long axis. The lobe there- 

 fore, like the left lateral, was prismatic in section, the base of the fissure being 

 directed forwards. On the abdominal aspect of the gland it overlapped the upper part 

 of the right lateral lobe. 



The Spigelian lobe (sp) was small, and represented by a narrow strip of hepatic 

 tissue that measured 5 inches in length and IJ in breadth. It was shorter, wider, and 

 less pointed than the corresponding lobe in B. sumatrensis, as figured by Professor 

 Garrod i. 



The liver was entirely invested by peritoneum, except along the attachment of the 

 suspensory and lateral ligaments and of the gastro-hepatic omentum. The extent to 

 which these folds of the serous membrane were attached to the gland is shown in the 

 Plates. The entire width of the lateral ligament was 16 inches. 



The structures at the portal fissure had the same mutual relationship as is observed 

 in the human subject. Thus the hepatic artery was placed upon the same plane as the 

 bile-duct, the vascular canal being to the left and the duct to the right. The portal 

 vein was alone and between the two. 



Just before entering the gland the artery and vein broke up into two trunks of equal 

 size, and in like manner the bile-duct was made up of two ducts of equal dimensions 



' P. Z. S. 1873, p. 102. 



