CHAPTER VIII 
THE VASCULAR SYSTEM 
HE account given by Bronn in his Thierreich 
T is apparently the only published description 
of the circulatory organs in the Crocodilia. 
This account, even when translated, is not very 
satisfactory, especially because it contains no dia- 
grams of the circulation. It was, therefore, deemed 
worth while to work out the circulation in the 
Florida alligator in order that we might have not 
only a written description, but also a series of more 
or less accurate diagrams of the veins and arteries. 
A number of departures from the description of 
Bronn were found, some of which are noted below. 
Most of the work was done upon animals of 
about thirty inches length, which were obtained 
alive from the Arkansas Alligator Farm at Hot 
Springs, Ark. 
The arteries were injected with a colored starch 
mass by inserting a two-way cannula into the 
dorsal aorta. With the blood thus forced into 
them from the arteries, the veins could, in most 
cases, be traced without difficulty. 
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