1- Ten heads were used in this work. 2- They were prepared in the ordinary way for studying blood vessels. 3- Careful dissection was carried out and the results, simulated that of the horse
with the exception of: a- The absence of the carotico-basilar artery. b- The anterior meningeal artery is given from the ethmoidal instead from the an
terior cerebral in the horse. 4- Discussion of the results with other domestic animals was also given in the text. 5- A diagram for the arteries of the brain was also plotted out.