1908.] 



ANATOMY OF A PROG. 



31 



liver and its relations to the heart have been bi-ought about, or at 

 any rate are accompanied, by an alteration in the normal (i. e. that 

 found in Banco) disposition of the anterior abdominal vein. This 

 vein in Breviceps gives off no branches to either lobe of the liver 

 until it reaches and has passed some way beyond the apex of the 

 heart. 



Text-fiff. 9. 



A. B, 



A. Part of oviduct. B. Stomach oi Sreviceps (laid opeu). 



a. Demarcation between stomacli and duodenum, oes. (Esophagus. 



f. Funnel of oviduct. 



In a second specimen which I dissected, a male, and which was 

 perhaps in consequence rather smaller than the first, measuring 

 only 33 mm. in total length, the liver showed certain differences. 

 The relative size of the two lobes was the same, but they were 

 not by any means so closely approximated in the middle line as 

 was the case with the larger example. This being so, much more 

 of the heart was visible on a ventral inspection of the viscus, and 

 the conditions more approached that to be seen in the Common 

 Frog. Still, however, there was a considerable difference ; for in 

 Rana the heart is distinctly ventral of the liver and the lobes 

 ■extend far beyond it in the direction of the cloaca. In Breviceps., 



