434 



COMPARATIVE ANATOMY 



Hypogast. arch 



R lymph-heart 



L. precava 



L. aortic arch 



Coccyg. mes. 



L. lymph-heart 



Pudend. 



FIG. 332. DIAGRAM OF THE TWO THORACIC DUCTS AND GREAT ABDOMINAL 

 AND CAUDAL LYMPH-TRUNKS OF A CHICK OF 17 DAYS' INCUBATION. (After 

 L. Sala.) 



The arteries are left clear, the veins shaded, the lymphatics black, and the lymph- 

 hearts dotted. 



geal vertebrae partly covered by the coccygeus dorsalis muscle : 

 they communicate with the coccygeal and pelvic veins. 



