442 



6. Abnormality in the arterial system of the Frog. 



By B. B. Watson. 



eingeg. 12. September 1896. 



In a frog provided for class-work my attention was drawn to the 

 following abnormality. 



The left lung was connected with the haemorrhoidal branch of 

 the mesenteric artery by a large well-developed vessel, which was full 



■jiiibnonary vein. 



■■■inf.vcn.ca,T. 



- lull/}- 



-coeliacomeseTiteric 



artery 

 —testis 



arterff connecting 

 Iiacmorrhoidal with liuig 



anterior abdominal vein- 



of blood and no doubt functional during life. I could find no trace of 

 any such artery on the other side of the body. The anterior end of 

 the lung was provided with a normal pulmonary artery and vein. 



The case is interesting as recalling the condition of the bloodves- 



