04 PROCKKDINOS OF THK ANA TOMK'AI, AND ANTHROPOLOGICAL 



position of the two cords are well seen in Plate VI. After having been 

 hardened by means of forraol injections the dissection was commenced 

 by cautiously raising up a Hap, the outlines of which arc indicated in 

 the first plate. The appearances presented after the removal of this 

 Hap are seen in Plate VII. At the line of junction of the twins there 

 is what appears to be a septum with a liver on each side of it, and an 

 umbilical vein passing to each liver. A further dissection (Plate VIII.) 

 shows these appearances to be somewhat misleading. The apparently 

 reduplicated liver is now seen to be a single viscus common to both 

 twins, and the apparent septum is a falciform ligament, the only one 

 which the twins possess. There are, however, undoubtedly two 

 umbilical veins, one for each twin. 



The liver was next removed ; its appearances as viewed from the 

 front are illustrated in Plate IX., whilst Plate X. shows the organ as 

 seen from the right side. The liver is a single viscus common to both 

 twins, and as viewed from the right side is seen to be almost com- 

 pletely divided into two parts anterior and posterior by a deep 

 notch on its inferior surface. On replacing .the liver in its original 

 position it was ascertained that this notch was occupied by a single 

 and transversely situated duodenal tube which passed from the 

 pylorus of the one stomach to the pylorus of the other. Some con- 

 ception of the position occupied by the liver whilst in xftti will be 

 obtained by referring to Plate XL, which illustrates the appearances 

 presented after removal of that viscus. The general mass of the small 

 intestine is seen to occupy the most dependent part of the common 

 abdominal cavity. The highest part of this intestinal mass is the 

 single transversely situated duodenal tube, upon which the liver sat, 

 as it were, astride. 



On removing the abdominal portions of the alimentary canals the 

 singular appearances illustrated in Plate XII. were eventually elicited. 

 There are two stomachs, each of which is 9 cm. long, connected to- 

 gether by a single duodenal tube, 12 cm. long. From this duodenal 

 tube, at a point 7 cm. from the right pylorus, there commences a 

 jejunum which assumes the form of a single tube common to both 



