494 MR. J. H. LLUYD OX 



The liver in this specimen is also peculiar. The left lobe is 

 normally developed and the left hepatic vein opens directly into 

 the sinus venosus. The right lobe is an elongated, slightly 

 dorso-ventrally flattened, cylindrical structure which is anteriorly 

 directed and terminates near the posterior edge of the mylohyoid 

 muscle. This lobe is divided into two portions by a transverse 

 constriction. About halfway along its length on the mesial 

 side of the dorsal surface, a hepatic vein runs out and opens into 

 the right precaval vein. The internal and external jugular veins 

 enter the precaval together dorsal to the abnormal lobe of the 

 liver. 



As far as I can ascertain this is the only case yet recorded of a 

 hepatic vein opening into a precaval. This irregularity is 

 obvious]}^ due to the abnormal condition of the liver. 



Text-tigure 1. 



Sketch of specimen A from ventral surface, sliewing persistent right posterior 

 cardinal vein and abnormal liver. B.V. brachial vein ; G.B. gall-bladder ; 

 I.R. interrenal vein; L.H.V. left hepatic vein; L.L. left lobe of liver; 

 P.C.V. right posterior cardinal vein; R.H.V. right hepatic vein; R.L. right 

 lobe of liver ; S.Y. subclavian vein. 



According to Hochstetter (1) the posterior portions of both 

 posterior cardnial veins fuse in Amphibia to form the interrenal 

 ( " Urniere ahschnitte ' ) portion of the postcaval, the anterior 

 portion (" Leherabschnitt '') of the latter being formed by a venous 

 connection between the anterior end of the interrenal vein and 

 the tip of the liver. It is suggested that in the specimen 

 described above the foimation of this venous connection was 



