398 The Vascular Supply of the Pleura Pulmonalis 
Fic. 7. From a section taken parallel to, and including, the pleura of the 
lung of a sheep. Thickness of section 200 micra. The lymphatics are par- 
tially collapsed. B. A. = bronchial artery. B. A’=points at which the 
pleural and pulmonary branches of the bronchial artery anastomose. i 
lymph vessel; in several places the valves are plainly visible. * — point at 
which a deep lymphatic joins the superficial network. X 3344. 
