Elements of comparative anatomy (1878) Elements of comparative anatomy elementsofcompar00gege Year: 1878 HEART AND ARTERIES OF VERTEBRATA. 587 given off on either side of a common trunk (G). They generally appear as two trunks, which pass along the sides of the neck in company with the vagus. In the Saurii they do not lose their connection with the next arterial arch, and retain, therefore, their primitive relations. In many Ophidii the right common carotid is atrophied, and may even completely disappear.

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