OF THE BLOOD AND CIECULATION. 215 



fibrous layers. The circulation through the lungs of the water 

 newt is a very beautiful object (fig. 230). The pulmonary 

 arteries (d) here expand very speedily into a fine-meshed 



>rk of intermediate vessels, which in general admit no 

 more than single files of blood-corpuscles playing around very 

 minute islets of the parenchyma of the lung (fig. 231). The 



:s always appear with distinct parietes, and terminate 

 partly in capillary veins of the same character as themselves 



-30), partly in larger venous trunks. The blood-corpus- 

 cles mixed with lymph-corpuscles (fig. 231, c),as already stated, 

 fill both arteries and veins close to their parietes. The same 

 appearances are presented in the branchial fringes of the larva/ 

 of the water-newt.]* 



* Professor Wagner's Physiology, page 294, et seq. 



