321 



Fig. 263. — The Arterial System of Emys europwa. 



Tr, trachea ; Br, Br, the two bronchi ; in, stomach ; d, d, small intestine ; i:, 

 large intestine ; Ap, pulmonary artery ; Cac, common carotids, with 

 tracheal and oesophageal branches (Tr, Oe); Sc, subclavian artery; Fer, vertebral 

 artery ; RA, roots of the aorta ; Ao, dorsal aorta ; Co, Co'-, and Me, cceliaco- 

 mesenteric artery, which here arises as a bundle of separate vessels ; UG, 

 urinogenital arteries ; Cr, crural artery ; E, epigastric artery ; 7s, sciatic 

 artery ; MB, posterior mesenteric arteries ; C, caudal aorta. 



Y 



