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UTAH ACADEMY OF SCIENCES 185 
ANASTOMOSING OF ARTERIES AND VEINS 
IN A CAT. 
By NEWTON MILLER AND JAMES S. GODFREY. 
In the spring of 1916 a number of cats were brought 
into the Zoological laboratory for dissection. Among this 
number was one which showed a very unusual degree of 
anastomosing of arteries and veins. 
A carmine starch mass was injected into one of the 
carotids with the result that it passed over into the veins, 
especially those of the hind legs and the posterior region 
of the abdomen. Since starch grains do not pass through 
the capillaries, it was evident that direct unions between 
arteries and vein were present. 
Examination showed one large connection between the 
caudal artery and the common iliac vein, which caused the 
filling of the post caval. In addition four others were 
found in the branches of the internal iliacs; seven in the 
branches of the femorals; three in the branches of the 
iliolumbars; two in the adrenolumbars, and one in the in- 
tercostals which filled the azygos vein. Also five others 
were found in the branches of the right subclavian artery 
and vein. This is a total of twenty three, besides there 
were evidences of others which we were unable to locate. 
