3 RANA 



5. View of the ventral aspect of same frog, in which the muscular wall of the abdomen has been opened 

 by a longitudinal cut a little to the left of the middle line so as to avoid the anterior abdominal vein ; the pectoral 

 girdle has been cut through a little to the left of the middle line ; the cut abdominal and pectoral walls are pinned 

 back on either side, and the anterior abdominal vein is doubly ligatured near where it enters the liver with thread^ 



Heart ; liver ; 



and djtfidecl between the ligatures. The viscepa are displaced so as to shew as much as possible. 

 gall-bladder ; lung ; stomach ; spleen ; duodenum and pancreas ; hepato-pancreatic duct ; intestine ; 

 or ovaries ; fat-bodies ; oviducts (in female) ; cloacal bladder. 



rectum; testes 



